String replacement Replace only replaces the first match

The String. Replace (string, string) method in C # replaces all the matching items, but sometimes we need to Replace the first matching item.

I will write another method here to implement this function. Please advise:

 

Replace (source, match, [] sArr = [] mArr = [] rArr = idx = (idx =-(sArr. take (idx ). concat (rArr ). concat (sArr. skip (idx + IndexOf ([] source, idx =-(I =; I <source. length-match. length; I ++ (source [I] = match [isMatch = (j =; j <match. length; j ++ (source [I + j]! === View Code

 

In the second method, I always feel uncomfortable and want to implement it better.