PowerTip: A Couple Quick PowerShell Array Tricks

i dont get the second part,

How do I join an array, such as the one in the $a variable shown here?

$a = "h","e","l","l","o"

Use the join static method from the string c.

where i put the join?

@Matheus Kamphorst  here is one way . . using the join operator. (there is also the split operator).

# Join

$a = "h","e","l","l","o"

$a -join "-"

> h-e-l-l-o

# Split

$a = "atl-ws-01,atl-ws-02,atl-ws-03,atl-ws-04"

$a -split ","

> atl-ws-01

> atl-ws-02

> atl-ws-03

> atl-ws-04

# Info under help topic

help about_operators

Another real life example is:

$ENV:PSModulePath -split ";"

> C:\Users\administrator\Documents\WindowsPowerShell\Modules

> C:\windows\system32\WindowsPowerShell\v1.0\Modules\

@Matheus: I don't know exactly what Ed means, but ....

You could use the [string] type (class) to see which static members if offers:

[string] | get-member -static

The "join" method is listed now.

If you want to know more about that method type: [string]::Join

And you can guess the meaning of the parameters now!

If you use the signature:

static string Join(string separator, Params string[] value)

this should work:  [string]::Join("",$a)

hello

Here we used an empty seperator, but you can use any string you like!

I hope it helps

Klaus

@Matheus Kamphorst

PS C:\> $a = "h","e","l","l","o"

PS C:\> [string]::join("",$a)

hello

@Ben Wilkinson,  @K_Schulte Thanks :-)

Hi,

here is also:

PS II>  $a = "h","e","l","l","o"

PS II> $_OFS=$OFS ; $OFS=[string]::Empty

PS II> "$a"

hello

PS II> # or

PS II> -join $a

hello

PS II> # or

PS II> [string]::Concat($a)

hello

PS II> $a = "atl-ws-01,atl-ws-02,atl-ws-03,atl-ws-04"

PS II> $a -replace ',',"`r`n"

atl-ws-01

atl-ws-02

atl-ws-03

atl-ws-04

$c = "h","e","l","l","o"

[string]::Join("',$c)

In about_join it shows the -join unary operator.

$z = "a", "b", "c"

-join $z

abc