southbay/lib/polyfills.js

Cocoa-inspired key-value coding, binding, and observing for node

/**
 * Detect is an argument is a function
 * @param {*} arg Something to test
 * @returns {Bool} true of the arg is a function
 */
Function.isFunction = function(arg) {
	return typeof arg === 'function';
};
/**
 * Method to match Array.isArray syntax for the old favorite
 * toString method of detecting a javascript object
 * @param {*} arg Something to test
 * @returns {Bool} true if the arg is an actual object
 */
Object.isObject = function(arg) {
	return this.prototype.toString.call(arg) === '[object Object]';
};
/**
 * Method to copy the declared, non-inherited, properties from one object to another.
 * Used internally by Kvc.create to allow a properties object to be passed in by the user
 * when making a new class instance
 */
Object.extend = function(to, from) {
	for(var p in from) {
		if(from.hasOwnProperty(p)) to[p] = from[p];
	}
	return to;
};
/**
 * String method that replaces delimiters with passed in object values.
 * As this method is on the String prototype `.expand({...})` can be called
 * on any string
 * @param {Object} data An object containing the data to insert into the string
 * @returns {String} the modified string
 */
String.prototype.expand = function(data) {
	return this.replace(/\$\{(.+?)\}/g,
		function(match, key) {return data[key];});
};