How to concatenate array of integers into comma separated string

Question

I have two question, acually:

1. How to join array of integers into comma separated string? (1,2,3) => \"1,2,3\"
2. How to convert array of integers t

Answer 1

In your question, you've commented out the following snippet:

($arraylist-join -',')

because it returns the error Cannot convert value "," to type "System.Int32"...

The reason for this is the dash - in front of ','.

In PowerShell, only operators and parameters are prefixed with a dash, and since ',' is neither (it's an argument to an operator), the PowerShell parser gets super confused and tries to treat -',' as a value expression that would result in a negative number.

Just void the dash and you'll be fine:

$arraylist -join ','

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Finally, you can easily cast an array of integers to an array of strings with the unchecked cast operator -as (PowerShell 3.0 and newer):

$StringArray = 1,2,3,4,5 -as [string[]]

or with an explicit cast (PowerShell 2.0-compatible):

$StringArray = [string[]]@(1,2,3,4,5)