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