laserkard: good-parts/first.js annotate

annotate good-parts/first.js @ 79:343dc947f999 laserkard

read JavaSctipt: the good parts

author	Robert McIntyre <rlm@mit.edu>
date	Sun, 25 Jul 2010 01:33:22 -0400
parents
children

rev	line source
rlm@79	1 document.writeln("hello world!");
rlm@79	2
rlm@79	3 Function.prototype.method = function (name, func) {
rlm@79	4 this.prototype[name] = func;
rlm@79	5 return this;
rlm@79	6 };
rlm@79	7
rlm@79	8
rlm@79	9 if (typeof Object.create !== 'function') {
rlm@79	10 Object.create = function (o) {
rlm@79	11 var F = function () {};
rlm@79	12 F.prototype = o;
rlm@79	13 return new F();
rlm@79	14 };}
rlm@79	15
rlm@79	16 Number.method('integer', function ( ) {
rlm@79	17 return Math[this < 0 ? 'ceil' : 'floor'](this);
rlm@79	18 });
rlm@79	19
rlm@79	20 String.method('trim', function ( ) {
rlm@79	21 return this.replace(/^\s+\|\s+$/g, '');
rlm@79	22 });
rlm@79	23
rlm@79	24
rlm@79	25 document.writeln((-10 / 3).integer( ));
rlm@79	26
rlm@79	27 document.writeln("whatev ".trim());
rlm@79	28 document.writeln("whatev ");
rlm@79	29
rlm@79	30 Function.method('curry', function ( ) {
rlm@79	31 var slice = Array.prototype.slice,
rlm@79	32 args = slice.apply(arguments),
rlm@79	33 that = this;
rlm@79	34 return function ( ) {
rlm@79	35 return that.apply(null, args.concat(slice.apply(arguments)));
rlm@79	36 };
rlm@79	37 });
rlm@79	38
rlm@79	39 var memoizer = function (memo, formula) {
rlm@79	40 var recur = function (n) {
rlm@79	41 var result = memo[n];
rlm@79	42 if (typeof result !== 'number') {
rlm@79	43 result = formula(recur, n);
rlm@79	44 memo[n] = result;
rlm@79	45 }
rlm@79	46 return result;
rlm@79	47 };
rlm@79	48 return recur;
rlm@79	49 };