Quick and dirty sprintf

sprintf.js

/*
 * Quick and Dirty sprintf
 * Copyright 2011 Nicholas C. Zakas. All rights reserved.
 * BSD licensed
 */

/*
 * This function does not attempt to implement all of sprintf, just %s,
 * which is the only one that I ever use.
 */
function sprintf(text){
    var i=1, args=arguments;
    return text.replace(/%s/g, function(pattern){
        return (i < args.length) ? args[i++] : "";
    });
}

/*
 * Usage:
 *   var result = sprintf("Hello %s, what a nice %s it is.", "world", "day");
 *   console.log(result);    //"Hello world, what a nice day it is."
 */

console.log/warn/info already has string formatting built in, but this is handy to add it to browsers that don't.