CodePuzzling::tumblr('!'); : Trim,ltrim & rtrim in #javascript

Trim,ltrim & rtrim in #javascript

Simple class to trim,ltrim and rtrim as it’s common in other languages.

trim = {
	both : function(str,ch) { # Equivalent to trim
		return trim.lead(trim.trail(str,ch),ch);
	},
	lead : function(str,ch) { # Equivalent to ltrim
		if (!ch)
			ch="\\s"
		return str.replace(
			new RegExp("^["+ch+"]+", "g"), ""
		);
	},
	trail : function(str,ch) { # Equivalent to rtrim
		if (!ch)
			ch="\\s";
		return str.replace(
			new RegExp("["+ch+"]+$", "g"), ""
		);
	}
}

You can use it like this

s = "  string  ";
# Trim both left and right, every type of char
alert(trim.both(s));
# Trim only right, and just look for \n
alert(trim.trail(s,"\\n"));