Research Triangle PowerShell Users Group PowerShell Saturday, 13 Apr 2020

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From YouTube: PSS: PowerShell 101 Arrays with Wes Carroll

Description

PowerShell Saturday is a training event for all things PowerShell. The event was held in Raleigh, North Carolina and hosted by Research Triangle PowerShell User Group.

Wes Carroll teaches you the basics with this Array 101 talk. This is a great talk for beginners to learn a bit more about the core constructs within PowerShell

The files for Wes's slides and code can be found on our github page:

https://github.com/rtpsug/PowerShell-Saturday/tree/master/2019-NC.State/

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I know right: it's.

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Recordings begun, thank you all for being here, PowerShell 101 we're going to be talking about a raise today before we get started number one. Thank you to our sponsors. Without them, we won't have this opportunity to get together. So that's a really important go outside you know say thank you see if they can help you out in any way number two. Thank you to you guys without you giving up your Saturday to be here. You know, none of us would be able to learn more Network figure out who's who's.

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In this world of PowerShell, Who am I, so my name is Wes Carol I'm, an Enterprise Architect at zurdo. We are going to cover absolutely nothing having to do with zero. Today, it's all going to be PowerShell I've got about 20 years of experience in the information technology. Space I've always been working with PowerShell since about 2012 when I started using it in anger, you can connect with me on LinkedIn, that's probably where I spend most of my time more time than I really should github, I'm just w carroll on github.

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If you guys are looking to get into powershell, I highly recommend going out to github checking out what they have for powershell projects. I think they're calling october is coming up here. What digitalocean they're going to be a lot of PowerShell projects that you guys can get involved in good for beginners? If you guys get started with that sign up on digital oceans website, they'll, send me a shirt with four pull requests. I think it is but go out and check it out. My email is w Carol at Ocean, Beach life.

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That's a story: we can get to it another time and then I am on Twitter at West Carroll tech, because apparently there are a lot of West Carol's out there. So what is it? A ray I mean we're literally going to start at the basics here right. An array is that- and this is a formal definition. An array is a data structure that is designed to store collection of items when I say formal definition.

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If you do get help about arrays, that is the definition that up these items can be of the same type for different types or they can be strongly typed, meaning when I declare my array, I can say, my array is only going to contain strings or integers or whatever you want it to be, we'll get into another way. That arrays can be strongly typed and may need to be strongly typed a little bit later.

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But something very important to understand is that the array size or the array count, the number of objects in an array is established when the array is initialized. This is immutable. It cannot be changed something just to kind of keep in your mind as we go along and then each item is assigned to static index. The way I like to think about an array is like a shopping list right, you say well, the first thing I mean is bread. Second, eggs thirds, milk right. Everything has a number.

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Each item has a number and it's got something associated with it, where arrays used they're, literally used everywhere in PowerShell, they're, so prevalent that even when you create a variable and you store a line of text or a string in it. What PowerShell does in the background is, it will actually assign an index to every character in that array, and then you can call that index in order to get just that character, so yeah, so that's without strings.

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The other way that you can use it is when you use a command line when you use a command like get process. What happens is is that and store it in generally and when that happens, it's going to create that process as this base type system array, this base type is what the array is built on, but you can see it's built on. The parent object object right, because everything in PowerShell is an object.

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So how do I create an array? Well, the first way to create an array is really simple: create a variable set it equal to @ symbol, open friends, close friends that creates an empty array. When we do this, when you create array it has properties inside of it. Just intrinsically that comes with that type, and one of those is a method called get type. So we can see that we're using that here again it is an array, but that's kind of useless. That's an empty array! There's nothing in there.

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It's just a variable, that's taking up space in your memory. So how do we make it more useful? Well, what we can do is we can start to add items. So I've got my first item. My second item, my third item, then I've got number 4 go ahead and you know hit enter still an array I've mixed my types here out of the system array.

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The main reason why you would see people use this or there are another option in order to use this is when you're, actually coding and you're, creating the text file that you will then rename to dot ps1 or you save it as not ps1 or whatnot. You can actually create an array, so it becomes a little bit more readable when you are typing it out, you'll notice. There are no commas separating this. When you create an array like this, it will actually with that carriage return.

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Powershell recognizes that as okay, we're done with this side and we're moving on to the next time we're moving on to the next side.

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So if you are ever looking at somebody else's code- and you happen to see an array declared like that, that's generally when we will see that app symbol, open parens and then this close friends down at the bottom is what will actually tell PowerShell that hey we're done, declaring all the items in the array move on and then the last item is you don't actually need the parentheses, because PowerShell will understand that the moment it hits a comma in a line item we've gotten array, we're going to put these items into a variable and we're going to create an array we're going, give them an index so again we're calling that get type method, and then we are going to figure out and see that it is an array real, quick, PowerShell, aside about these methods, is you can tell it's a method and not a property of the variable because of the parentheses, if you're ever wondering and you're looking at you know, you're looking at code or something, then somebody kind of calls one of these and it's a it's a array or a variable name, dot, something if it ends, in parentheses, that is an actual method that you can call on that variable in order to get some information back so and then the last way is kind of what we talked about right, just use a command light set the output to into a variable, and then we can see here even though I get processed.

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That would return all the processes that are running on the computer. It puts it into array, so I can use it later. So how do I access the data in a race, because it's great to have the data in an array, but how do I actually access it and use it? Well.

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First way you can access, it is just call the variable right, like in your command line, go ahead and I'm using whisky's, because I think created this power point without having a glass of whiskey in my hand and I actually used all the different kinds of whiskey's that I had so I've got my array: I've got bourbon rye, scotch single-malt, Irish and Canadian, and then, when I set all those into my variable and I call my variable and over there on the right hand, side.

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What we can see is our left hand side as y'all are looking at it. I've got to remember that it's switched so over there. On the left hand, side we have the output and you'll notice that it's a first in first out queue right order matters in a race. The first item that you put is always going to be the first item in the array, and it comes out in that right order or in that exact order, but this isn't really useful.

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It's just a great way to print something out to the screen and if that's what you're using it for fantastic, but you can't do anything with it. So how do we access everything? Well, the index that index that I talked about that one. Two, three, four: five: when we go ahead and we set the variable to our items and then we have a property called count, so every variable or every array variable has a property called count and count will tell you the number of items in that array, and it comes back to six.

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The problem is: is that you and I learn to count going one. Two: three computers learn to count going: 0 1 2. So what you have to understand is is that the index that is assigned starts at zero. It always starts at zero. It's never not going to start at zero, and the last item is always going to be the count of the array minus one all right. So if we ever need to get the last item, we can say all right how many items there in the array? Six great.

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We need the fifth item. How do we actually do that? Well, still, the index so still have my whiskies and in this case, I want to get whisky with index number two. So in order to access that item in there I call my variable and then I do a square bracket. The number of the item close square bracket. This is going to tell powershell that hey return. The item that is index number two, and in this case it happens to be Scotch.

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So I've just asked PowerShell give me this item, and this is this is how you see items called more often than not, but sometimes.

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Sometimes we want more than one item, so we can actually in an array we can actually use an array of numbers to call certain items. So in this case we're asking for items 1, 3, &, 5, again, PowerShell starts at 0 or computers started 0.

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So when we actually execute that it's going to go ahead and it's going to return rye, single-malt and Canadian, this gives us a little bit more flexibility in calling the data from PowerShell so that we might be able to make one call to get the data we need so continuing on PowerShell. It's got this great functionality that I love that it's gonna work, no okay! Well, my tricks are out parcels got this great functionality, number dot dot next number.

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What this allows us to do is this allows us to top how to tell PowerShell look I want a range of numbers, starting at this number and ending inclusively at that last number. So, when I call this actual command and I execute it, it's going to return three items: it's going to return, bourbon, rye and Scotch items zero, one and two.

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This is one of the ways that we can get a slice of the array if you're familiar with other programming languages, some of them call this a they actually call it a slice, but it allows us to get certain items out of the array and we could actually and I don't have a screenshot of this, but we can actually know I do have a screenshot we'll.

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That to that later, um so there you go more often than not. So this is another cool powershell trick, and if you were in the previous session, it was actually used. um This allows us to again set the array and do negative one negative. One is a way to tell powershell look. Give me the last item in the array. I don't know how many items I have I just know: I need the last one, so we choose negative one and when we execute that it outputs Canadian.

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Mom pace so that negative one is a great trick to understand. Just depending on what you're doing look look, I, don't care about the rest of it. I know it's all an array I just want. The last item give me whatever that last item is, but we can do the same tricks that we have with the positive numbers. We can give it a couple different ones in a rate format with that comma and get not just the last item, but we can say negative. Three and I'll start counting backwards.

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So if Canadian is negative, one Irish is negative. Two single malt is going to be negative. Three in this case, I only want negative one in negative three, so I get my Canadian and I get my single malt again with the range I want negative one through negative three I'm going to get Canadian Irish and single malt, starting with negative one going to negative three or I can mix and match. You know we talked about order. Order is important in a race if I want it to come out in a certain order.

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Powershell is going to parse it in the order that I dictate in my square brackets, so we're going to get negative one. First, Canadian zero bourbon five is Canadian again, so I got the same element twice, calling it two different ways: I'm going to apologize for how fast I'm going I literally have 53, slides and I cut that down from 60. So.

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Again, how do I access the data we still can use going from negative 1 to negative 3 that dot dot connotation all PowerShell is going to do? Is it's going to count? How do I start at negative 1 and how do I get to negative 3? Well, I gotta go through negative 2, so we're going to get Canadian, Irish and single malt the same way. It will count up how do I get from negative 3 to 1? Well, I can go.

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You know: 3 negative 3, single malt negative, 2, Irish, negative 1 Canadian.

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Any questions about this.

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Ok, so again, I have my whiskies now, when I set it to a variable. Now, I've got this one item out of my array into my variable: I can call my variable and it comes up urban same thing with several of them. So again my comma separated value I go 0 to 3, and what will happen is is that it will assign those values into a new array.

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I didn't do a get type on this, but if I looked at favorite again, favorite would now be a new array consisting of 3 items, and in this case they would be re indexed, so in favorite index 0 would be bourbon index 1 would be Scotch index. 2 would be single malt. But in my fate in my whiskey's array, all those indexes would remain the same, so they become two different objects. At that point,.

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His favorite a string or a.

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In that, in that case, favorite is going to if I did a get type on, that favorite would be a string, but there's an advanced use case where you could actually use an array call in order to to kind of force it into array with PowerShell.

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In fact, if I did yeah, we won't get into it. We don't give it okay, so the other one thing that we can do that's really cool is. We can actually create an array of variables set that equal to the actual array and then what's going to happen is, is as I call each of those variables first is going to get the the first item, which is whiskey or index 0 or its bourbon index. 0.

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Second, try third is scotch, and then it takes the rest of the array and it assigns it to the last one. So if I'm interested in you know like the first two items and I want to create an array that has everything that I did put in to the first two, this is the way that I can do it. So whiskey's is my array and then I PowerShell is reading through that way array.

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It's taking the first item at index, zero and putting it into the first variable, and then it's taking the second one putting a second third third and then the rest in into that final variable.

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If I wasn't interested in the rest, yeah.

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I, throw it away by using the dollar no or some other discard yeah.

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If you weren't interested I would make that last, one dollar sign null just do the fact that whatever the last one is PowerShell is just going to take the remainder and shove it in there right so again, we can also do it where we actually call indexes.

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So this time, I only want the three right or yeah I only want the three I want the first second and last so I create that those three variables and then I set it to the array. I use the indexes that I want, and so I get the first one, the second one in the last one right in this case, I don't need the rest, because I've told PowerShell exactly what I want in those variables all right.

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Any questions about accessing the data I'm either really good or you guys are still waking up one of the two. So how do I change the data? Well, Canada is in a type of whiskey. That's ridiculous!

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So I made a mistake: I set my variable, I called it, and I realized that Canada is not a whiskey. I I made a typo I can do two things. I could recreate the array or I could go ahead and use the index again in order to fix my mistake. In this case, I'm saying: look: I need to change index five I happen to know that the Canada one is index five I'm going to change that I'm going to set it equal to Canadian, and then, when I call my whiskey's variable again Canadian.

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The last item has been updated to Canadian from Canada.

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Here's where we get to the meat of a race, because, most of the time when you have an array, you need to do something with each of those items right and so we've got a few possibilities in order to get through. The array first possibility is the for each object via the pipeline.

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There is an alias for this. Don't ever learn it.

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Tell you why you don't ever learn it, because if you- and this is my own personal belief and I'm about to you- know expose you all, do it so I apologize if you start using aliases in your code and you go back and you look at your code two years later, you're gonna wonder what idiot wrote that code and you're going.

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Oh, that was me, make your code readable, explicit, is so much easier to read than implicit, so I highly highly highly recommend that we stop using aliases in our code that we are going to either have to consume later or are writing it for other people to consume I bring this up because there is an alias for it. Like I said, please don't learn it that is going to be by the pipeline.

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We have the for each loop on the for each loop is something that we will get to, but it's a way to loop through and have something be accomplished on every item in the array, and then we have the for each method. Now. This is a method that is associated with the race or the array type, and we will talk about that. We also have the switch loop. The switch loop is a great way of going through each item and having something be performed, and then we have the for loop up until today.

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I never seen any PowerShell code written with the for loop, I thought today and I was impressed, so it is out there, but we're actually going to go over each of these methods, except for the for loop. If you are interested in it or you think you have a need for it, you know go ahead and look it up, but I think for the majority I'm pretty sure that these four options will cover what you need.

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So we'll talk about the for each object first, and this is via the pipeline right. This is where what PowerShell allows us to do. Is it allows us to take our variable use this character here? That character will tell PowerShell, hey, send this variable down the pipeline and then what we're going to do is we're going to call for each object, and then we have our open, curly braces, open, curly braces tells us to go ahead and call this command write, output and now I've got my string.

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What I want to write dollar sign PS item is good, close curly bracket. Everything inside that curly bracket is called a script block that will be executed. Okay on each object, so when I execute it I get bourbon is good, right is good. Scotch is good. Single malt is good. Irish is good, Canadians good they're, all good and I I was able to do that by the pipeline. Sometimes- and this goes back to my alias or actually let me talk about dollar sign PS item.

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This is an automatic variable that gets created when you are going through. This PS item refers to the one item that I'm working with now, because what arrays, what this for each does is it goes alright. Let me take the first object and let me do something with it. Alright. Now let me take the next object, so we need a way to refer to that. That is this dollar sign PS item that is automatic.

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You may see that as dollar score.

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That is also a way to do this again. It's an alias and I will admit to you. My sin: I used dollar underside, underscore all the time um either way will work. Thank you. Thank you. Dollar underscore will work. You will see it written this way out in the wild, but that's all it means is dollar sign, PS item the for each loop, I would say that I use this 99.9% of my scripts. I I, don't really use the other methods.

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This is what I have well I do use switch, but for each loop it is mainly what I use, and so in this case we have our variable again and it's just another way of doing it. It's for each and now we don't have the object here, but it's for each and open parentheses item in items.

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This is the way that we need to think about. This is this one item in this list of items. Okay, close start script, block, write, output, whiskey is good.

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When I run it it does, the same thing is that is that for each you're going to see this version, in my opinion, is, is that you're going to see this version? When you have a lot of complex code here, this script block can get very, very complex, very, very quickly. I've got a script that I wrote for a customer of mine and I have one for each loop.

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That is because I didn't use functions, a thousand lines, long, okay, yeah I was young, I had learned, but everything you know you'll generally see that when you have a lot a lot to go through.

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That's the advantage of doing it this way over using the PS item.

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Over the PS item.

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Because what works in this block right here, we are explicitly saying, take take the first item out of whiskey's and put it into this variable, whiskey right and then once I, once we've completed that come back up to the top. Take the next item out of whiskey's and put it into whiskey. When we are looking at this, when we are looking at this item, we don't have an opportunity to name our variable right, we're not. We don't have a way to say you know like call it call this whiskey.

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It doesn't give us the opportunity, whereas in this I, believe that this makes for better readable code.

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All right for each method- oh man, 29, slides through 28 minutes in you guys we're on a roll here, okay for each method. So again, this is a method. Remember when we saw get type right, get type am I going the right way: yeah yeah, yeah, yeah I'm, going the right way. Okay, the get type is a method. Again we have our variable dot. Our method and with one of our methods is for each. We have the opportunity again to open parens, curly brace script block.

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Whenever you see a curly, brace, think script block right, right, output, I did it myself. Dollar under sign is good, so we get that output, three different ways to really achieve the same objective again. This is going to this could be used in very, very simplistic code. Where you're, not you don't have a lot of logic behind it. You don't have a lot of well.

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If this, then that if this, then that you know you don't have those things you have look I just want to I need to change the computer name and append you know my username or something like that to it. It's it's simplistic opportunities.

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The switch loop, the switch loop is like a for each loop and an if statement embedded into one and in fact, through some recent testing, switching can actually be faster, which was just talked about in the last session, but switching is faster than for each with. If statements.

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It's not like a try except it's. um The way that I have it is I've, got my whiskey's and then, when I say switch on the variable. That means go through each item right and match it to bourbon rye or something else. Okay, now you can get a lot more complex with a switch statement. This talk is not about the switch statement, so I'm not going to get more complex.

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This is about arrays, but you can use arrays in switch statements. So what we're going to do is without again calling a specific variable it's going to go through and it's going to iterate through each object in the for each or in the whiskey's array, and it is going to match that item based on what I have here. So if I misspelled bourbon up there nothing's going to happen because it won't match right.

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So when I run this I get my output I get you know different outputs depending on the item of the array, so that is a switch loop. How do I filter a race because sometimes I've got two thousand items or ten thousand items. There are a hundred thousand items. I only want certain items. Well, we've got the where object again. The pipeline. The pipeline is important here and then the way or method so.

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Again, just like the for each method, this is a method that is associated with the Rays that we can call and we'll look at an example. So where object, this is a pipeline again right in this case, I have ten numbers and I go ten numbers pipe it where object dollar underscore percent two percent in PowerShell means modular or mod modulo. Thank you. A modulo two meaning remainder I'm, going to take my number I'm going to divide it by to show me what the remainder is: equals zero.

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So I'm asking in this method, I'm asking for only even numbers when I run it I get two four six. Eight ten I get only the even numbers.

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Whereas the we're method is very similar, except instead of the pipe input, I have the dot input and just wear.

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Parentheses, script lock now in this case I'm asking for % to equals 1. So what you guys think I'm going to get here: I, don't have candy, I'm. Sorry, odd numbers, good! We are listening, I'm, so glad no.

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That's ok, thank you. I know who to talk to if you want candy so yeah. So in this case we have odd numbers. So this is just a way for us to. You know, apply some logic in order to get this now. There is a whole bunch of logic that you can apply in order to get what you're looking for, and it really depends on your situation as to you know, if you're going to use an equals or a match or a math function or this or that or the other thing again.

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That is a whole nother topic, but it is something that we can use in arrays in line either by the pipeline or the method. Yes, sir,.

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Yes, you can absolutely, and that is one of the things is because what and this is getting into the internals of PowerShell, but it's it's almost like a hidden pipeline is what's happening as it goes down right, your dot. Okay, send it to this next thing: send it to this next thing and it can. It can become really ugly but really useful, not as ugly as regex, but still pretty ugly. So how do I remove data from erase you don't.

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Date of insider race can be updated, but individual items cannot be removed, meaning if you want a ruse on that, you can set it to dollar sign null, meaning look: there's nothing here to see kind of move on to the next one, but it's still taking up an index space. It's still there and then using a logic. You can create a new array, so using logic you can create a new array. Again we talked about the dot dot, meaning for every number in this range inclusive.

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Put that into my number array. So again, I'm going to use evens. My evens is going to equal for each number in number array. Script block. If number is divisible by two output: number: okay, when I say output number here, you know and we're going to get into to this a little bit later so help this work with me here we're going to shove it into that variable. We're going to create a new array where, if I do even's dot count is 50 number a dot count is a hundred meaning.

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I saw my old array, but using my logic, I've created a new array. The new smaller array, okay, how do I add data to erase you don't.

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Inside of race can be updated by increasing the size. Count of the array is not possible, less I think you're, forgetting about the plus equals operator, get about it. If you've never learned it don't learn it. If you have I'm going to show you why it's bad, what's wrong with a plus equals operator array plus equals is expensive.

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You might say yourself. My computer is so fast doesn't matter if you say that you obviously weren't here for the previous session, because we found out that it's all I/o, but it negatively impacts performance. It absolutely negatively impacts performance, and let me tell you why arrays are immutable when you do the plus equals what you are doing is you're, saying I've got this old array and I need to add an item to it. Take all the data that was in there create a new item, shove all that data into that new item and append.

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My last item, you do that for one item. Okay, do that for two items you do that for 10,000 items, what's gonna happen! Well, I tested it. So if I have values, one through 10,000 I create my empty array for each value in values. My array plus equals value. My array count at the end is 10,000. I've got a really cool function in my prompt. That shows me how long the last command took that took five point, one five seconds to run. Okay, what happens if you'll have a hundred thousand any guesses hundred thousand.

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That longer, you think 10 times longer wrong. hmm Any other guesses, almost 10 minutes to run this I might not be stats 101, but I ran it a few times.

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10,000 was 5.2, 20,000 double the numbers four times as long right, quad the numbers from 22 to 3 6 2 over 5 minutes, you go from 80,000 to 10,000, we almost doubled by adding 20,000 items. That's bad!

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How do I build the dynamically size array? Then I, don't know how many items are in there. I need to just be able to do my thing, man all right, well, cool! This is where this comes in. My array equals for each value in values, output, value. What this is going to do is this is going to actually act like a pipeline and it's going to do everything on the right side of the equal sign first before it assigns it to the left side.

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Okay- and this is a classic example of where you're going to want to use. It is in your for each statement because you may not know how many items you have to output, but if you go through your for each statement, you apply logic to it and then you shove it into the array. You can see that I've added 10,000 items and just spoiler alert 10,000 items. I lost 1, 2 five seconds left 23 milliseconds to do 10,000 items in this method.

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So how does that scale very well, go to 10,000 items 0.2 seconds to do it so and as you go up and up and up this is going to you know, scale appropriately right. um It's almost in the last one was exponential. Almost this is very, very closer to linear. In fact, you know some of these values may change a little bit just because the measure command is a little yeah, but you're going to see better, better, better, better, better performance using this method than the plus equals method, all right les.

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What if we need to add, remove I can't live without adding and removing. Well, we got two options. We got the ArrayList and then we've got the generic list. A regulus is deprecated, so if you don't know it don't use it learn array learning about your generic list. If you do use it, you can get by it'll still work. It still functions, but you know try to start using generic lists.

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So an ArrayList is it's. A dotnet PowerShell is built on dotnet, so we have access to dotnet, which is fantastic.

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You'll notice that I'm on a Mac I'm, not just saying that, because I'm telling you that this works in PowerShell core, just as well as it works in other powershell versions, we have system collections, not ArrayList, it's deprecated forget you ever saw it. It's.

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Not in court, no, it.

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Is in core, it is a core yeah. Generic lists is the way to go now. Remember at the beginning, I said strongly: typed is a well strongly-typed is demanded in this generic list. Right you actually have to tell the list what type of operation or what type of data is going go in there. Let's say you don't know. Well, just tell it it's the PS object, let it figure it out later right, but if you can strongly type it I recommend doing so again. So this is just an example.

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In this case, I declare my variable I, do my count. I have zero items. I go through a few ads. I now have three items in there: I output, the items and there they are again I- have all the access to all the other stuff. We've talked about using generic lists. I, don't need to reinvent the wheel. I, don't need to learn anything else. I just need to declare it in a slightly different way.

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Then what we have is we have the ability to remove, so I can remove using an index, and what will happen is it'll say true. I was able to remove it. I can use an index, it doesn't exist, it will come back and say false I couldn't remove it. There was nothing there. Yeah.

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B

A

Not removing zero I'm removing the item, because PowerShell is going to evaluate this understand what it is and remove it just like if I were to use text so again, whiskey, zero, I'm asking for what is in index zero. At this point, it's rye whiskies, remove rye, so I can call it by the item that it actually is I, don't have to know where it is I mean if it appears multiple times it's going to find the first one is going to remove it.

A

Then I asked what is whiskey zero and it's Scotch I've updated the array I've removed an item. I have re-indexed ever think all in one all in one fell swoop,.

C

A

Not work for a race; this is, if you absolutely can't get by without manually, adding and removing stuff, and there are times that that's necessary.

C

A

Glad you asked I, don't have a fancy graph, the the performance is so much better than plus equals it's slightly more expensive, slightly, like I. Think. A hundred thousand items was like three three hundred milliseconds right rather than 211 milliseconds, but it is more expensive all right. What did I leave out because it is 1044 and we are almost through 53, slides, crazy couple. Things I left out comparison operators, because this is a whole nother kettle of fish right equals not equals contained and in.

A

Learn about those two: it will save you so much headache, but I. Consider that a 102 topic unfortunately- and this is 101 match regex, replace you put and then split I didn't cover those okay, Oh resources. Where did I learn this stuff right, get help boundaries better yet get help about a race online go to the go. The bookmark the the documentation is on Microsoft Power Cell explained all about a raised bike and I'm going to slaughter the Man's last name: Kevin Marquette. He is PowerShell genius.

A

He lays out everything for you to understand in such a way that I think my wife begun to understood what I was talking about near the end, but she's an artist and not a powershell. So you know SS 64. It's got some outdated stuff. It talks about using.

A

Arraylist rather than generic list, but the data is still good, partial months of lunches by Don John and Geoffrey Hicks Tyler line Leonhardt, who is very active in the Twitter community. He just is republishing this for mac, OS and Linux with powershell core I announced it yesterday. I haven't bought it yet, but I'm planning on doing it, I highly, recommend it and then partial cones.

A

We, if you are learning powershell download this figure it out it uses pester to help to help out what you you know to help before I move on. We are going to stop that we're going to help hope that this works, because you know can I send this hey. It works. Ok, so I want to talk about the pipeline, real, quick and something to be aware of oops.

A

So I've got my array I've just set it to one two. Three four I wasn't going to do this demo until about an hour ago and then I realized that I need to it be careful of the pipeline right. So what I can say there is a there's. A process in PowerShell called get member get member is going to show you everything you need to know about the object, but I've got integers here numbers.

A

So, if I do my array get member which is perfectly valid and legal, it's going to send it to the pipeline and, what's going to happen, is, is I'm going to get it name of integer 32? These are methods and of parameter or methods and properties for the integer type, not for the array type you might get tripped up if you're, like oh man, I can't remember what that was. How do I do it? What we need to do is we need to go get member.

A

A

My array, and now we have system objects. The pipeline is fantastic, be careful with it, because this this here led me to about eight hours of me banging my head against the wall.

A

I'm shivering thinking about all right dot is legitimately the the last slide was it said QA. So, according to this, it's going to stop any moment now, but any questions.

A

Awesome. Thank you all for being here. I appreciate your time.

C

A

Man happy to do it I'm glad glad I was able to get you because I appreciate your time.