CODEWITHSUNDEEP
regexpowershell
Andrew Shepherd
Andrew Shepherd

Reputation: 45242

Insert number in Powershell replace

Using powershell I want to replace a specific numeric part of a string with another number.

It's best to describe this problem with an example.

$s = '   First part: 65 Second Part'

###################################################################
# this generates "       First part: sixty-six Second Part"       #
###################################################################
$s -replace '^(\s*First part:\s+)[0-9]+(.*)$', '$1sixty-six$2'

###################################################################
# But I want to generate"    First part: 66 Second Part"          #
###################################################################
$s -replace '^(\s*First part:\s+)[0-9]+(.*)$', '$166$2'

It doesn't work.

How do I specify "$1 followed by the number 66" as opposed to "$166"?

Upvotes: 2

Views: 441

Answers (2)

manojlds
manojlds

Reputation: 301147

You can do this:

$s -replace '^(\s*First part:\s+)[0-9]+(.*)$', '${1}66$2'

or

$s -replace '^(?<first>\s*First part:\s+)[0-9]+(.*)$', '${first}66$1'

Both are similar, except that the second one uses a named group.

I am not sure what you are trying to do ( the example seems cooked up) but there must be easier way to do what you want and also you can make use of 

$`

and

$'

to signify the portions before and after a match respectively.

Upvotes: 2

Andy Arismendi
Andy Arismendi

Reputation: 52577

Use this syntax: ${1}66$2

Output:

'   First part: 66 Second Part'

Upvotes: 5

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