javascript need to do a right trim
Use a RegExp. Don't forget to escape special characters.
s1 = s1.replace(/~+$/, ''); //$ marks the end of a string // ~+$ means: all ~ characters at the end of a string
You can modify the String prototype if you like. Modifying the String prototype is generally frowned upon, but I personally prefer this method, as it makes the code cleaner IMHO.
String.prototype.rtrim = function(s) { return this.replace(new RegExp(s + "*$"),''); };Then call...
var s1 = "this is a test~";var s = s1.rtrim('~');alert(s);
There are no trim, ltrim, or rtrim functions in Javascript. Many libraries provide them, but generally they will look something like:
str.replace(/~*$/, '');For right trims, the following is generally faster than a regex because of how regex deals with end characters in most browsers:
function rtrim(str, ch){ for (i = str.length - 1; i >= 0; i--) { if (ch != str.charAt(i)) { str = str.substring(0, i + 1); break; } } return str;}