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klyn.regex.RegEx.replaceFirst
method
public native replaceFirst(input as String, replacement as String) as String:
Description
Replaces the first occurrence of the pattern with a replacement string. 
regex = RegEx(r"\d+")
result = regex.replaceFirst("123 abc 456", "#")  # result will be "# abc 456"
Parameters
  • input The string where the replacement will be performed.
  • replacement The replacement string.
Returns
The string after the replacement. ``` regex = RegEx(r"\d+") result = regex.replaceFirst("123 abc 456", "#") # result will be "# abc 456" ```