I need help using regex and extracting a string after a colon

Question

I need a little help using regex.

This is the scenario :

function name(a :String)

or

function name(a :String) : String

If we have the version with return type, I will need exactly the string after the colon, otherwise I would need let's say an empty string.

Thanks in advance.

Answer 1

Try this :

[a-zA-Z]*\s*\)\s*:\s*([a-zA-Z]*)

Answer 2

This regex may help:

\)\W+(\w+)

where $1 will hold the value of return type

Answer 3

Any word followed by : and a whitespace

(?<=:\s)(\w+)

Answer 4

Try the following:

matches = /\)\s*:\s*(\w*)/gi.exec("function name(a :String) : String");
retType = matches && matches.length>=2 ? matches[1] : "";