Some test object extensions for a blog post.

utils.js

exports.utils = function () {

    if ( typeof String.prototype.startsWith != 'function' ) {
        String.prototype.startsWith = function( str ) {
            return this.substring( 0, str.length ) === str;
        }
    };

    if ( typeof Object.prototype.sum != 'function' ) {
        Object.prototype.sum = function( ) {
            var sum = 0,
                that = this;
            for (var i = 0; i < that.length; i++) {
                sum += that[i];
            }

            return sum;
        }
    };

    if ( typeof Object.prototype.any != 'function' ) {
        Object.prototype.any = function( ) {
            return this.length > 0;
        }
    };

    if ( typeof Object.prototype.replaceAll != 'function' ) {
        Object.prototype.replaceAll = function(a, b) {
            var that = this;
            while (that.indexOf(a) !== -1) {
                that = that.replace(a, b);
            }

            return that;
        }
    };
}