Jxck · July 9, 2011 12:02
diff --git a/ecma5_on_v8.js b/ecma5_on_v8.js
 /**
 * The sample usage of ECMA 5 Mozilla Features Implemented in V8
 * https://github.com/joyent/node/wiki/ECMA-5-Mozilla-Features-Implemented-in-V8
 * You can use thease new feature of ECMA5 on Node.js as you like.
 * because there is no IE :)
 * Order is deferent form original wiki.
 * Sources are Checked on Node.js v0.5.0(unstable), v0.4.9(stable)
 *
 * you can execute this file.
 * $ node ecma5_on_v8.js
 *
 * @author Jxck
 * @license https://www.opensource.org/licenses/mit-license.php (The MIT License).
 */

 // console.log is tooooooo long :(
 var log = console.log;


 log('---- Object -----');

 var obj = {
  _str: 'default',
  get str() { // getter
    return this._str + '!';
  },
  set str(val) { // setter
    this._str = val.trim();
  }
 };
 log(obj.str); // "default!"
 obj.str = ' asdf ';
 log(obj.str); // "asdf!"


 log('---- Object.defineProperty(obj, prop, desc) ----');

 var obj = {};
 Object.defineProperty(obj, 'num', {
  value: 10,
  writable: false,
  enumerable: false,
  configurable: false
 });
 log(obj.num); // 10
 for (var i in obj) {
  log(i); // not display
 }
 obj.num = 20;
 log(obj.num); // still 10


 log('---- Object.defineProperties(obj, props) ----');

 var obj = {};
 Object.defineProperties(obj, {
  num: {
    value: 4,
    writable: false,
    enumerable: false,
    configurable: false
  },
  root: {
    get: function() {
      return Math.pow(this.num, 0.5);
    }
  }
 });
 log(obj.num); // 4
 log(obj.root); // 2


 log('---- Object.create(proto, props) ----');

 // extends x, y
 var obj = Object.create({x: 10, y: 20});
 log(obj.x); // 10
 log(obj.y); // 20

 var obj = Object.create(null);
 log(obj); // not extend anything

 var obj = Object.create(Object.prototype);
 log(obj); // same as {} , new Object()

 var obj = Object.create({x: 10, y: 20}, {
  z: {
    value: 30,
    writable: true
  },
  sum: {
    get: function() {
      return this.x + this.y + this.z;
    }
  }
 });
 log(obj.x); // 10
 log(obj.y); // 20
 log(obj.z); // 30
 log(obj.sum); // 60


 log('---- Object.keys(obj) ----');

 function o() {
  this.a = 1;
 }
 log(Object.keys(new o())); // [ 'a' ]
 function p() {
  this.b = 2;
 }
 p.prototype = new o();
 log(Object.keys(new p())); // [ 'b' ]


 var obj = Object.create({a: 10, b: 20}, {
  x: {
    value: 30,
    enumerable: true
  },
  y: {
    value: 40,
    enumerable: false
  }
 });
 log(Object.keys(obj)); // [ 'x' ]


 log('---- Object.getOwnPropertyNames(obj) ----');

 var obj = Object.create({a: 10, b: 20}, {
  x: {
    value: 30,
    enumerable: true
  },
  y: {
    value: 40,
    enumerable: false
  }
 });
 log(Object.getOwnPropertyNames(obj)); // [ 'y', 'x' ]


 log('---- Object.getPrototypeOf(obj) ----');

 var obj = Object.create({a: 10, b: 20}, {
  x: {
    value: 30,
    enumerable: true
  },
  y: {
    value: 40,
    enumerable: false
  }
 });
 log(Object.getPrototypeOf(obj)); // { a: 10, b: 20 }


 log('---- Object.getOwnPropertyDescriptor(obj, property) ----');

 var obj = Object.create({a: 10, b: 20}, {
  x: {
    value: 30,
    enumerable: true
  },
  y: {
    value: 40,
    enumerable: false
  }
 });
 log(Object.getOwnPropertyDescriptor(obj, 'x'));
 // { value: 30,
 //   writable: false,
 //   enumerable: true,
 //   configurable: false }


 log('---- Object.preventExtensions(obj) ----');

 var obj = {a: 10, b: 20};
 Object.preventExtensions(obj);
 // obj.x = 30; // TypeError: Can't add property x, object is not extensible


 log('---- Object.isExtensible(obj) ----');

 var obj = {a: 10, b: 20};
 log(Object.isExtensible(obj)); // true
 Object.preventExtensions(obj);
 log(Object.isExtensible(obj)); // false


 log('---- Object.seal(obj) ----');

 var obj = {a: 10, b: 20};
 Object.seal(obj);
 obj.a = 30;
 log(obj.a); // 30
 // obj.x = 30; // TypeError: Can't add property x, object is not extensible


 log('---- Object.isSealed(obj) ----');

 var obj = {a: 10, b: 20};
 Object.seal(obj);
 log(Object.isSealed(obj)); // true


 log('---- Object.freeze(obj) ----');

 var obj = {a: 10, b: 20};
 Object.freeze(obj);
 obj.a = 30;
 log(obj.a); // 10


 log('---- Object.isFrozen(obj) ----');

 var obj = {a: 10, b: 20};
 Object.freeze(obj);
 log(Object.isFrozen(obj)); // true


 log('---- isPrototypeOf(obj) ----');

 var proto = {a: 10, b: 20};
 var obj = Object.create(proto);
 log(proto.isPrototypeOf(obj)); // true


 log('---- bind(thisArg[, arg1[, argN]]) ----');

 var f = function() {
  return this.a + this.b;
 };
 log(f()); // NaN
 var g = f.bind({ a: 10, b: 20 });
 log(g()); // 30


 var f = function(c) {
  return this.a + this.b + c;
 };
 log(f()); // NaN
 var g = f.bind({ a: 10, b: 20 }, 30);
 log(g()); // 60


 var f = function(c, d) {
  return this.a + this.b + c + d;
 };
 log(f()); // NaN
 var g = f.bind({ a: 10, b: 20 }, 30);
 log(g(40)); // 100


 log('---- JSON.stringify(obj [, replacer [, space]]) ----');

 log(JSON.stringify({ a: 1 }));

 log(JSON.stringify([1, 2, 3], function replacer(key, value) {
  if (!Array.isArray(value)) {
    return value;
  }
  var len = value.length;
  var result = { length: len };
  for (var i = 0; i < len; ++i) {
    result[i] = value[i];
  }
  return result;
 }));

 log(JSON.stringify({ a: 1, b: 2}, null, 2));
 log(JSON.stringify({ a: 1, b: 2}, null, 4));
 log(JSON.stringify({ a: 1, b: 2}, null, '\t'));

 log('---- JSON.parse(string) ----');

 var s = JSON.stringify({ a: 1, b: 0 });
 log(JSON.parse(s));

 log(
 JSON.parse(s, function(key, value) {
  if (value === 0)
    value = false;
  else if (value === 1) {
    value = true;
  }
  return value;
 })
 );

 log('---- trim(), trimRight(), trimLeft() ----');

 log(' abc '.trim());
 log(' abc '.trimRight());
 log(' abc '.trimLeft());


 log('---- Array.isArray(array) ----');

 log(Array.isArray([]));


 log('---- indexOf(value) ----');

 log(([1, 2, 2, 3]).indexOf(2));


 log('---- lastIndexOf(value) ----');

 log(([1, 2, 2, 3]).lastIndexOf(2));


 log('---- filter(callback) ----');

 log(
 ([1, 2, 3, 4]).filter(function(x) {
  return x > 2;
 })
 );


 log('---- forEach(callback) ----');

 ([1, 2, 3]).forEach(function(x) {
  log(x * 2);
 });


 log('---- every(callback) ----');

 log(
 ([1, 2, 3]).every(function(x) {
  return x > 0;
 })
 );

 log(
 ([1, 2, 3]).every(function(x) {
  return x > 1;
 })
 );


 log('---- some(callback) ----');

 log(
 ([1, 2, 3]).some(function(x) {
  return x > 2;
 })
 );

 log(
 ([1, 2, 3]).some(function(x) {
  return x > 3;
 })
 );


 log('---- map(callback) ----');

 log(
 ([1, 2, 3]).map(function(x) {
  return x * 2;
 })
 );


 log('---- reduce(callback[, initialValue]) ----');

 log(
 (['a', 'b', 'c']).reduce(function(x, y) {
  return x + y;
 })
 );

 log(
 (['a', 'b', 'c']).reduce(function(x, y) {
  return x + y;
 }, '*')
 );


 log('---- reduceRight(callback[, initialValue]) ----');

 log(
 (['a', 'b', 'c']).reduceRight(function(x, y) {
  return x + y;
 })
 );

 log(
 (['a', 'b', 'c']).reduceRight(function(x, y) {
  return x + y;
 }, '*')
 );


 log('---- Date.now() ----');

 log(Date.now());


 log('---- toISOString() ----');

 log((new Date()).toISOString());
	/**
	* The sample usage of ECMA 5 Mozilla Features Implemented in V8
	* https://github.com/joyent/node/wiki/ECMA-5-Mozilla-Features-Implemented-in-V8
	* You can use thease new feature of ECMA5 on Node.js as you like.
	* because there is no IE :)
	* Order is deferent form original wiki.
	* Sources are Checked on Node.js v0.5.0(unstable), v0.4.9(stable)
	*
	* you can execute this file.
	* $ node ecma5_on_v8.js
	*
	* @author Jxck
	* @license https://www.opensource.org/licenses/mit-license.php (The MIT License).
	*/

	// console.log is tooooooo long :(
	var log = console.log;


	log('---- Object -----');

	var obj = {
	_str: 'default',
	get str() { // getter
	return this._str + '!';
	},
	set str(val) { // setter
	this._str = val.trim();
	}
	};
	log(obj.str); // "default!"
	obj.str = ' asdf ';
	log(obj.str); // "asdf!"


	log('---- Object.defineProperty(obj, prop, desc) ----');

	var obj = {};
	Object.defineProperty(obj, 'num', {
	value: 10,
	writable: false,
	enumerable: false,
	configurable: false
	});
	log(obj.num); // 10
	for (var i in obj) {
	log(i); // not display
	}
	obj.num = 20;
	log(obj.num); // still 10


	log('---- Object.defineProperties(obj, props) ----');

	var obj = {};
	Object.defineProperties(obj, {
	num: {
	value: 4,
	writable: false,
	enumerable: false,
	configurable: false
	},
	root: {
	get: function() {
	return Math.pow(this.num, 0.5);
	}
	}
	});
	log(obj.num); // 4
	log(obj.root); // 2


	log('---- Object.create(proto, props) ----');

	// extends x, y
	var obj = Object.create({x: 10, y: 20});
	log(obj.x); // 10
	log(obj.y); // 20

	var obj = Object.create(null);
	log(obj); // not extend anything

	var obj = Object.create(Object.prototype);
	log(obj); // same as {} , new Object()

	var obj = Object.create({x: 10, y: 20}, {
	z: {
	value: 30,
	writable: true
	},
	sum: {
	get: function() {
	return this.x + this.y + this.z;
	}
	}
	});
	log(obj.x); // 10
	log(obj.y); // 20
	log(obj.z); // 30
	log(obj.sum); // 60


	log('---- Object.keys(obj) ----');

	function o() {
	this.a = 1;
	}
	log(Object.keys(new o())); // [ 'a' ]
	function p() {
	this.b = 2;
	}
	p.prototype = new o();
	log(Object.keys(new p())); // [ 'b' ]


	var obj = Object.create({a: 10, b: 20}, {
	x: {
	value: 30,
	enumerable: true
	},
	y: {
	value: 40,
	enumerable: false
	}
	});
	log(Object.keys(obj)); // [ 'x' ]


	log('---- Object.getOwnPropertyNames(obj) ----');

	var obj = Object.create({a: 10, b: 20}, {
	x: {
	value: 30,
	enumerable: true
	},
	y: {
	value: 40,
	enumerable: false
	}
	});
	log(Object.getOwnPropertyNames(obj)); // [ 'y', 'x' ]


	log('---- Object.getPrototypeOf(obj) ----');

	var obj = Object.create({a: 10, b: 20}, {
	x: {
	value: 30,
	enumerable: true
	},
	y: {
	value: 40,
	enumerable: false
	}
	});
	log(Object.getPrototypeOf(obj)); // { a: 10, b: 20 }


	log('---- Object.getOwnPropertyDescriptor(obj, property) ----');

	var obj = Object.create({a: 10, b: 20}, {
	x: {
	value: 30,
	enumerable: true
	},
	y: {
	value: 40,
	enumerable: false
	}
	});
	log(Object.getOwnPropertyDescriptor(obj, 'x'));
	// { value: 30,
	// writable: false,
	// enumerable: true,
	// configurable: false }


	log('---- Object.preventExtensions(obj) ----');

	var obj = {a: 10, b: 20};
	Object.preventExtensions(obj);
	// obj.x = 30; // TypeError: Can't add property x, object is not extensible


	log('---- Object.isExtensible(obj) ----');

	var obj = {a: 10, b: 20};
	log(Object.isExtensible(obj)); // true
	Object.preventExtensions(obj);
	log(Object.isExtensible(obj)); // false


	log('---- Object.seal(obj) ----');

	var obj = {a: 10, b: 20};
	Object.seal(obj);
	obj.a = 30;
	log(obj.a); // 30
	// obj.x = 30; // TypeError: Can't add property x, object is not extensible


	log('---- Object.isSealed(obj) ----');

	var obj = {a: 10, b: 20};
	Object.seal(obj);
	log(Object.isSealed(obj)); // true


	log('---- Object.freeze(obj) ----');

	var obj = {a: 10, b: 20};
	Object.freeze(obj);
	obj.a = 30;
	log(obj.a); // 10


	log('---- Object.isFrozen(obj) ----');

	var obj = {a: 10, b: 20};
	Object.freeze(obj);
	log(Object.isFrozen(obj)); // true


	log('---- isPrototypeOf(obj) ----');

	var proto = {a: 10, b: 20};
	var obj = Object.create(proto);
	log(proto.isPrototypeOf(obj)); // true


	log('---- bind(thisArg[, arg1[, argN]]) ----');

	var f = function() {
	return this.a + this.b;
	};
	log(f()); // NaN
	var g = f.bind({ a: 10, b: 20 });
	log(g()); // 30


	var f = function(c) {
	return this.a + this.b + c;
	};
	log(f()); // NaN
	var g = f.bind({ a: 10, b: 20 }, 30);
	log(g()); // 60


	var f = function(c, d) {
	return this.a + this.b + c + d;
	};
	log(f()); // NaN
	var g = f.bind({ a: 10, b: 20 }, 30);
	log(g(40)); // 100


	log('---- JSON.stringify(obj [, replacer [, space]]) ----');

	log(JSON.stringify({ a: 1 }));

	log(JSON.stringify([1, 2, 3], function replacer(key, value) {
	if (!Array.isArray(value)) {
	return value;
	}
	var len = value.length;
	var result = { length: len };
	for (var i = 0; i < len; ++i) {
	result[i] = value[i];
	}
	return result;
	}));

	log(JSON.stringify({ a: 1, b: 2}, null, 2));
	log(JSON.stringify({ a: 1, b: 2}, null, 4));
	log(JSON.stringify({ a: 1, b: 2}, null, '\t'));

	log('---- JSON.parse(string) ----');

	var s = JSON.stringify({ a: 1, b: 0 });
	log(JSON.parse(s));

	log(
	JSON.parse(s, function(key, value) {
	if (value === 0)
	value = false;
	else if (value === 1) {
	value = true;
	}
	return value;
	})
	);

	log('---- trim(), trimRight(), trimLeft() ----');

	log(' abc '.trim());
	log(' abc '.trimRight());
	log(' abc '.trimLeft());


	log('---- Array.isArray(array) ----');

	log(Array.isArray([]));


	log('---- indexOf(value) ----');

	log(([1, 2, 2, 3]).indexOf(2));


	log('---- lastIndexOf(value) ----');

	log(([1, 2, 2, 3]).lastIndexOf(2));


	log('---- filter(callback) ----');

	log(
	([1, 2, 3, 4]).filter(function(x) {
	return x > 2;
	})
	);


	log('---- forEach(callback) ----');

	([1, 2, 3]).forEach(function(x) {
	log(x * 2);
	});


	log('---- every(callback) ----');

	log(
	([1, 2, 3]).every(function(x) {
	return x > 0;
	})
	);

	log(
	([1, 2, 3]).every(function(x) {
	return x > 1;
	})
	);


	log('---- some(callback) ----');

	log(
	([1, 2, 3]).some(function(x) {
	return x > 2;
	})
	);

	log(
	([1, 2, 3]).some(function(x) {
	return x > 3;
	})
	);


	log('---- map(callback) ----');

	log(
	([1, 2, 3]).map(function(x) {
	return x * 2;
	})
	);


	log('---- reduce(callback[, initialValue]) ----');

	log(
	(['a', 'b', 'c']).reduce(function(x, y) {
	return x + y;
	})
	);

	log(
	(['a', 'b', 'c']).reduce(function(x, y) {
	return x + y;
	}, '*')
	);


	log('---- reduceRight(callback[, initialValue]) ----');

	log(
	(['a', 'b', 'c']).reduceRight(function(x, y) {
	return x + y;
	})
	);

	log(
	(['a', 'b', 'c']).reduceRight(function(x, y) {
	return x + y;
	}, '*')
	);


	log('---- Date.now() ----');

	log(Date.now());


	log('---- toISOString() ----');

	log((new Date()).toISOString());