CODEWITHSUNDEEP
stringpowershell
TheHux
TheHux

Reputation: 53

PowerShell - How to insert a colon character before the first backslash in a string?

In PowerShell I have a string with a value similar to :

> text/text/text\text\text\text

The string is variable length, and may have different numbers of forward and back slashes.

I want to insert a colon (:) character before the first backslash only. So change it from ... 

> text/text/text\text\text\text

to ... 

> text/text/text:\text\text\text

What's the simplest way to do this?

Thanks

Upvotes: 5

Views: 12130

Answers (2)

Mathias R. Jessen
Mathias R. Jessen

Reputation: 174690

Use the Insert() and IndexOf() string methods:

$string = 'text/text/text\text\text\text'
$result = $string.Insert($string.IndexOf('\'),':')

String.IndexOf():

Reports the zero-based index of the first occurrence of the specified string in this instance.

while String.Insert():

Returns a new string in which a specified string is inserted at a specified index position in this instance.

With PowerShell 3.0+ you can also easily use regular expressions to insert the ::

$result = $string -replace '(?<!\\.*)\\',':\'

Upvotes: 5

Mark Wragg
Mark Wragg

Reputation: 23385

I was going to suggest this but Mathias' answer is better:

$text = 'text/text/text\text\text\text'

$bs = $text.IndexOf('\')
"$($text.Substring(0,$bs)):$($text.Substring($bs))"

Upvotes: 1

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