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Tip of the Day
Language: Web
Expertise: Beginner
Apr 29, 2002

Adding Left and Right Functionality in JavaScript


JavaScript does not offer Left and Right functions. Use the following functions to extract the left or the right part of a string.
 
function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}
function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}
B. Devington
 
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