In my Javascript file, I want to replace:
var user1 = {id: 'Alan Banks'};
var user2 = {id: 'Chris Daily'};
with
var user1 = {id: 'Alan_Banks'};
var user2 = {id: 'Chris_Daily'};
I can match the user names with the following regex in VSCode, Sublime (and Dreamweaver too, out of desperation):
id: '(.*?)'
So capture group $1 now holds the content of the id property of each user.
How can I perform the second part of my operation, being replacing the spaces in the captured substring with underscores?
In Visual Studio Code, you can use
Find: (?<=id:\s*'[^']*?)\s(?=[^']*')
Replace: _
See the regex demo. Details:
(?<=id:\s*'[^']*?) - a positive lookahead that matches a location that is immediately preceded with id:, 0+ whitespaces, ', and then any 0 or more chars other than ' as few as possible\s - a whitespace(?=[^']*') - a positive lookahead that matches a location that is immediately followed with 0+ chars other than ' and then '.In Sublime Text 3, that supports PCRE regex search and replace, you can use
Find: (?:\G(?!\A)|id:\s*')[^'\s]*\K\s(?=[^']*')
Replace: _
See another regex demo. Details:
(?:\G(?!\A)|id:\s*') - end of the previous match or id:, 0+ whitespaces and '[^'\s]* - 0+ chars other than ' and whitespace\K - omits all text matched so far\s - a whitespace(?=[^']*') - a positive lookahead that matches a location that is immediately followed with 0+ chars other than ' and then '.