Writing a PS form in SAPIEN PS studio 2018.
Problem: I have a random string, in text box, that contains square brackets in it ('[' or ']')
Expected: Need to allow the user to type only one brackets sequence
For example:
1> bla[]bla //valid 2> []bla //valid 3> bla[[] // not valid 4> b[la[] // not valid 5> b]la[] // not valid etc.. My code so far(Used the solution from here):
if ($this.Text -match '(\[){2,}') { $this.Text = $this.Text -replace '(.*?)\[(.*)', '$1$2' } if ($this.Text -match '(\]){2,}') { $this.Text = $this.Text -replace '(.*?)\](.*)', '$1$2' } This code works only when the brackets are matched together(example 3), but it doesn't work for example 4 and 5, any suggestions please?
ANSWER, by Lieven Keersmaekers
@('bla[]bla','[]bla','bla[[]','b[la[]','b]la[]') | % { $_ -replace '\[.*\]', '[]' -replace '\](?=.*\[)'} 1 Answer
Following works for the examples and constraints you've given
-replace '\[.*\]', '[]' -replace '\](?=.*\[)' The gist of this is to
'\[.*\]', '[]'removes everything between the first open and last closing bracket'\](?=.*\[)'removes remaining closing brackets having a positive lookahead for an opening bracket
Example
@('bla[]bla','[]bla','bla[[]','b[la[]','b]la[]') | % { $_ -replace '\[.*\]', '[]' -replace '\](?=.*\[)'} Returns
bla[]bla []bla bla[] b[] bla[] 
