I need to override the collection variable from command line using --env-var(there is no --collection-var in options) but seems not working, I think because collection variable is narrow than the environment so won't work. I cannot change the collection variable in the source, or give the new name of this variable, so how to override?
Related
I'm currently working on a PowerShell module, and I've come across something rather unusual that I cannot figure out how to duplicate. I'm using a module from Az PowerShell 3.2.0 as a reference.
I have the following example from Microsoft's Az.Dns Module:
https://learn.microsoft.com/en-us/powershell/module/az.dns/Add-AzDnsRecordConfig
$RecordSet = Get-AzDnsRecordSet -Name www -RecordType A -ResourceGroupName MyResourceGroup -ZoneName myzone.com
Add-AzDnsRecordConfig -RecordSet $RecordSet -Ipv4Address 1.2.3.4
Set-AzDnsRecordSet -RecordSet $RecordSet
The $RecordSet variable is being set locally, passed as a parameter to the Add-AzDnsRecordConfig command of this module, and the value of the $RecordSet local variable is then being automatically updated. When this variable is passed to the Set-AzDnsRecordSet command as a parameter, it contains the updated value it was assigned and not its initial value. Note that there is no additional assignment statement of the return value of Add-AzDnsRecordConfig.
How is this possible?
I know that I can define a function parameter as type [ref] or System.Management.Automation.PSReference and then pass by reference when it is called as function -param ([ref]$myVariable). I can then update the value using $myVariable.Value, but that is not what is happening here. Somehow, this variable is being passed by value, and the value is being updated back in the local scope as if it were passed by reference.
Changing the name of the local variable also does not break this functionality. I've also done a Show-Command -Name Add-AzDnsRecordConfig and I can confirm that the type is not System.Management.Automation.PSReference.
I have a need to duplicate this functionality as closely as possible, as I am building a wrapper of sorts around this, but I am not sure how Microsoft is making this magic happen within this command.
#zett42 Thank you for the concise answer. I definitely over-complicated this, and I did not realize that objects were automatically passed by reference without the need to specify it. As it turns out, I can simply reference the parameter within the function as $RecordSet.Property = "New Value".
Back in the local scope, that does update the initially defined variable.
https://johnfabry.azurewebsites.net/2015/06/26/powershell-reference-types-and-value-types/
This article also helped me to understand how this works.
I have the following code:
onClick="location.href='#Url.Action("StampPdf", "EditPdf", new {pView = currentPdfView})'" />
which when clicked calls a method called StampPdf(PdfView pView) on a controller called EditPdfController. The controller method is called, with the variable pView, but instead pView has all its properties equal to null. It's as if the PdfView class has been instantiated afresh. Within my cshtml razor file, currentPdfView is instantiated and has all properties with values assigned to them, but in the controller the properties are null.
This user here had the same issue, but there is no followup on whether it was resolved or not.
Is there something I need to do to make this work?
It doesn't know how to serialize the model into a query string :)
You need to break your model into multiple properties with simple values, or use a form POST to submit them as a model.
You can also serialize the model into e.g. JSON and pass it as a string.
I have a variable area which stores a number.
When the app is restarted, it is reset back to it's original value. How can I keep area persistent after being closed?
I'm using Flash CS6 for Android
You'll have to save the variable. There's multiple ways to do this but using a SharedObject is the easiest IMO.
First thing is you don't actually create a new instance of the SharedObject class, you instead call the static function getLocal and this sets your variable. So somewhere near the start of your program you'll want something like this:
var gameSave:SharedObject = SharedObject.getLocal("gameSave");
This either creates a new locally persistent shared object if one does not exist or it grabs the one with the same initialized name ("gameSave") on your computer. This way you can access the saved variables across multiple playthroughs.
Now to save a variable you simply use the dataObject on the shared object and write values to it, then you call the function flush when you're done writing values to immediately save the shared object to your computer.
So saving your area value would look something like this:
gameSave.data.area = Main.area;
gameSave.flush();
After that you'll want to set the area value to whatever the saved value is when your game launches:
if (gameSave.data.area !== undefined) Main.area = gameSave.data.area;
We check if the value is undefined because it might not exist yet if you're playing the game for the first time and the area hasn't been saved yet.
Last thing in case you want to expand the scope of this and save more values: you can only write specific values to the shared object. The way I understand it is you can only write certain class types and primitives. If you try to write anything that's not a primitive or the exception classes, it'll automatically convert that item to an Object and it more or less becomes useless. The classes that it can accept that you'll probably use the most are: int, uint, Number, String, Boolean, Object, and Array. It has a few others like ByteArray and XML, but you'll either not use those at all or not use them very frequently. If you want to save any other class type you'll have to add that functionality yourself.
This is driving me potty.
I'm trying to pass two SSIS variables to a command line executable using an Execute Process Task object.
No matter what I try, the values are not being passed through.
This is how it is set currently:
The variables are in scope and are of type string (representing integer values).
Sods law came into effect after posting this question. I tried evaluating my variables as an expression and assigning the resulting string to the arguments property.
I don't see why this would work over the example I gave, but it does, so I'm using that.
Ok, so this might be me being pendantic but I need to know the best way to do something:
(This is psudocode, not actual code. Actual code is huge)
I basically have in my package a class that goes like this:
internal class charsys extends DisplayObject {
Bunch of Variables
a few functions
}
I another class which I intend to add to the timeline I want to create a function like this:
public class charlist {
var list:Array = new Array();
var clock:Timer = new Timer(6000);
var temp:charsys;
function addObj(MC:DisplayObject, otherprops:int) {
temp=MC;
temp.props = otherprops;
list.push(temp)
}
function moveabout(e: event) {
stuff to move the items in list
}
function charlist() {
stuff to initialize the timers and handle them.
}
}
So the question is, is my method of populating this array a valid method of doing it, is there an easier way, can they inherit like this and do I even need to pass the objects like I am?
(Still writing the package, don't know if it works at all)
Yes, you can pass an object into a function, but you should be careful of what you are planning to do with that object inside that function. Say, if you are planning to pass only charsys objects, you write the function header as such:
function addObj(MC:charsys, otherprops:int) {
Note, the type is directly put into the function header. This way Flash compiler will be able to do many things.
First, it will query the function body for whether it refers to valid properties of a passed instance. Say, your charsys object does not have a props property, but has a prop property, this typing error will be immediately caught and reported. Also if that props is, for example, an int, and you are trying to assign a String value to it, you will again be notified.
Second, wherever you use that function, Flash compiler will statically check if an instance of correct type charsys is passed into the function, so if there is no charsys or its subclass, a compilation error is thrown.
And third, this helps YOU to learn how to provide correct types for functions, and not rely on dynamic classes like MovieClip, which can have a property of nearly any name assigned to anything, and this property's existence is not checked at compile time, possibly introducing nasty bugs with NaNs appearing from nowhere, or some elements not being displayed, etc.
About common usage of such methods - they can indeed be used to create/manage a group of similar objects of one class, to the extent of altering every possible property of them based on their corresponding values. While default values for properties are occasionally needed, these functions can be used to slightly (or not so slightly) alter them based on extra information. For example, I have a function that generates a ready-to-place TextField object, complete with formatting and altered default settings (multiline=true etc), which is then aligned and placed as I need it to be. You cannot alter default values in the TextField class, so you can use such a function to tailor a new text field object to your needs.
Hope this helps.
This would work, I think I would assign values to the properties of the charsys object before passing it into the add method though, rather than passing the properties and having a different class do the property assignment. If you have some common properties they could either have defaults in charsys class definition or you could set literals in the addObj method.