asin:B004XQX4K0
JavaScript: The Definitive Guide
(Kindle ed.)
David Flanagan
[邦鐃緒申:JavaScript 鐃緒申6鐃緒申]

鐃竣わ申鐃夙わ申鐃緒申鐃緒申鐃獣て￥申 js-object-clone 鐃緒申鐃所ー鐃緒申鐃緒申鐃殉わ申鐃緒申鐃緒申

鐃緒申鐃緒申的鐃祝わ申 404 Blog Not Found:javascript - ECMAScript 5 鐃緒申 Object.clone 鐃緒申鐃緒申鐃緒申鐃緒申討澆鐃� 鐃緒申屮鐃獣ワ申鐃遵ア鐃獣プわ申鐃緒申鐃緒申里任鐃緒申鐃緒申鐃緒申磴わ申發�鐃緒申泙鐃緒申鐃�

  • DOM object 鐃緒申 clone 鐃熟種申蟆種申鐃�
  • prototype鐃緒申張鐃熟なわ申
    • Object.clone鐃緒申鐃宿駕申
  • 鐃緒申售愎鐃�Object.equals鐃緒申鐃宿駕申
  • ES5鐃緒申鐃緒申鐃出縁申
    • property descriptor鐃緒申鐃緒申鐃銃わ申鐃緒申鐃�/複鐃緒申
    • .isExtensible, isSealed, isFrozen 鐃塾常申鐃瞬わ申鐃緒申鐃�/複鐃緒申

SYNOPSIS

var src = { name: 'dankogai', lang: ['perl'] };
var dst = Object.clone(src);        /* shallow copy */
log( Object.is(src, dst));          /* false */
log( Object.equals(src, dst) );     /* true */
dst.lang.push('javascript');
log(JSON.stringify(src.lang) );     /* ["perl","javascript"] because dst is shallow-copied */
dst = Object.clone(src, true);      /* deep copy */
dst.lang = dst.lang.reverse();
log( JSON.stringify(src.lang) );    /* ["perl","javascript"] */
log( JSON.stringify(dst.lang) );    /* ["javascript","perl"] */








鐃緒申鐃緒申鐃緒申鵐�ワ申鐃緒申鐃準オ鐃瞬ワ申鐃緒申鐃緒申鐃夙もコ鐃峻￥申鐃緒申能鐃叔わ申鐃緒申鐃緒申




var Point = function(x, y) {
    if (!(this instanceof Point)) return new Point(x, y);
    this.x = x*1;
    this.y = y*1;
};
Point.prototype = {
    distance: function(pt) {
        if (!pt) pt = Point(0,0);
        var dx = this.x - pt.x;
        var dy = this.y - pt.y;
        return Math.sqrt(dx*dx + dy*dy);
    }
};
var src = Point(3,4);
var dst = Object.clone(src, true);
log( src === dst              );   /* false */
log( Object.equals(src,dst)   );   /* true */
log( dst.distance(Point(0,0)) );   /* 5 */





RegExp鐃緒申Date鐃盾コ鐃峻￥申鐃叔わ申鐃殉わ申鐃緒申




var src = new Date(0);
var dst = Object.clone(src, true)
log( src === dst                );
log( Object.equals(src, dst)    );
log( dst                        );
src = /./g;
dst = Object.clone(src, true);
log( src === dst                );
log( Object.equals(src, dst)    );
log( dst                        );





鐃準し鐃緒申必鐃竣わ申鐃獣わ申鐃塾は￥申Object.equals鐃緒申鐃緒申鐃緒申鐃獣わ申鐃緒申鐃盾。鐃緒申鐃緒申劼砲覆辰鐃緒申鐃緒申屮鐃緒申鐃緒申鐃緒申箸鐃緒申鐃俊とわ申鐃緒申鐃塾はテワ申鐃夙わ申颪�誌申鐃祝わ申鐃淑わ申多鐃術わ申鐃緒申里任鐃緒申鐃緒申鐃緒申鐃緒申任鐃�idiom鐃夙なっわ申鐃緒申鐃緒申鐃緒申鐃緒申


var copyViaJSON = function(o){ return JSON.parse(JSON.stringify(o)) };



鐃緒申鐃夙わ申鐃緒申匹鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申弍鐃緒申任鐃緒申覆鐃緒申鐃叔わ申鐃緒申諭鐃�undefined鐃緒申null鐃祝わ申鐃緒申鐃純う鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃準オ鐃瞬ワ申鐃緒申鐃緒申鐃夙わ申鐃夙わ申.toJSON()鐃緒申鐃緒申鐃緒申鐃緒申覆鐃緒申隼箸鐃淑�鐃祝なわ申覆鐃緒申辰鐃緒申蝓�_.clone鐃祝誌申辰討蓮鐃緒申鐃緒申發緒申鐃�deep copy鐃緒申鐃塾ワ申鐃楯￥申鐃夙わ申鐃銃なわ申鐃叔わ申鐃緒申鐃緒申鐃殉わ申鐃銃わ申ES5鐃緒申property descriptor鐃殉わ申鐃出縁申鐃緒申鐃銃わ申鐃緒申鐃塾となわ申箸匹鐃緒申砲盡�鐃緒申鐃緒申鐃緒申泙鐃緒申鐃叔わ申鐃緒申鐃緒申鐃緒申


Enjoy (deeply)!


Dan the Man with too Many Objects to Compare and Copy


Source:






'
      ).text();
    }
    var query = {s:text};
    if (lang) query['l'] = lang;
    var url = 'http://api.dan.co.jp/lleval.cgi';
    var proto = 'json';
    if ($.browser.msie || $.browser.opera){ 
        url   += '?c=?';
        proto += 'p';
    } /* falls back to JSONP */
    $.get(url, query, function(json){
        $(dstNode).html(json2table(json)).hide().show('slow');
    }, proto);
};

})(jQuery);