03.String.js

/* * * * * * * * * * * * * * * * * * * * * *
 *   CAVEMAN JS PT 3: STRING.PROTOTYPE     *
 * * * * * * * * * * * * * * * * * * * * * */

// Primitive values can get in on the method madness too! 


/**  Object.keys  **/
// A little warmup before we get to the actual `String.prototype`, this 
// function takes an object and returns an array of it's key names. Note 
// it's not on the prototype! In the wild you'd write: `Object.keys(obj)`.
var keys = function(object) {

};


/**  String.prototype.slice  **/
// This useful method copies a piece of a string from a start index 
// (inclusive) and an end index (non-inclusive). `Array.prototype` 
// has a similar  method. Make your `slice` to work for both.
var slice = function(stringOrArray, start, end) {

};


/**  String.prototype.trim  **/
// A handy little method for processing text. Returns the input string 
// with all white space removed from the beginning and the end. 
var trim = function(string) {

};


/**  String.prototype.replace  **/
// Searches for a target sub-string and replaces it. 
// Note that only the first instance is replaced.
var replace = function(string, target, replacement) {

};