(string) lcFirst                    ($haystack, [$delimiter = '_'])
                
    First word to uncapitalize, even if it was acronym.
Parameters:
| name | type | default | caption | 
|---|---|---|---|
| $haystack | string | String to Convert. | |
| $delimiter | string | '_' | Delimiter. | 
Returns:
- (string) — Uncapitalized String.
Author:
- StewEucen
Since:
- Version 1.0.0
Examples:
use StewEucen\Acts\IntactCase
IntactCase::lcFirst('StudlyCaps') //=> "studlyCaps"
IntactCase::lcFirst('UIView')     //=> "ui_View"