How to use string.format with a string array in powershell

Question

I want to output a formatted string to the console. I have one string variable and one string array variable.

When I do this:

$arr = "aaa","bbb"
"test {0} + {1}" -f "first",$arr

Conclusion:

test first + System.Object[]

But I need a conclusion:

test first + aaa,bbb

Or something similar...

+5

jumbo May 16 '12 at 10:39

1 answer

Joey · Accepted Answer · 2012-05-16T10:47:29+0000

Several parameters:

Join the array first, so you don't rely on the default implementation ToString()(which just prints the class name):
```
PS> 'test {0} + {1}' -f 'first',($arr -join ',')
test first + aaa,bbb
```

Use string interpolation:

PS> $first = 'first'
PS> "test $first + $arr"
test first + aaa bbb

You can change the separator used by the installation $OFS, which is the default space:

PS> $OFS = ','
PS> "test $first + $arr"
test first + aaa,bbb