extjs源码分析-016(Ext....)

Ext.apply(Ext, function(){  var E = Ext, idSeed = 0;  return {     emptyFn : function(){},//空函数      value : function(v, defaultValue, allowBlank){            return Ext.isEmpty(v, allowBlank) ? defaultValue : v;     },     escapeRe : function(s) {//对特殊字符转义            return s.replace(/([.*+?^${}()|[\]\/\\])/g, "\\$1");     },     sequence : function(o, name, fn, scope){//创建队列函数          o[name] = o[name].createSequence(fn, scope);      },      addBehaviors : function(o){//添加时间行为            if(!Ext.isReady){                Ext.onReady(function(){                    Ext.addBehaviors(o);                });            } else {                var cache = {}, // simple cache for applying multiple behaviors to same selector does query multiple times                    parts,                    b,                    s;                for (b in o) {                    if ((parts = b.split('@'))[1]) { // for Object prototype breakers                        s = parts[0];                        if(!cache[s]){                            cache[s] = Ext.select(s);                        }                        cache[s].on(parts[1], o[b]);                    }                }                cache = null;            }        },         combine : function(){//数据组合,返回组合后的数据 //把所有参数拼到一个数组中返回 Ext.combine(['a','b'],'c')  返回['a','b','c']            var as = arguments, l = as.length, r = [];            for(var i = 0; i < l; i++){                var a = as[i];                if(Ext.isArray(a)){                    r = r.concat(a);                }else if(a.length !== undefined && !a.substr){                    r = r.concat(Array.prototype.slice.call(a, 0));                }else{                    r.push(a);                }            }            return r;        },        copyTo : function(dest, source, names){//把某对象的属性复制给目标对象names为属性名,可以是数组，字符串           * @param {Object} The destination object.         * @param {Object} The source object.         * @param {Array/String} Either an Array of property names, or a comma-delimited list         * of property names to copy.         * @return {Object} The modified object.            if(typeof names == 'string'){                names = names.split(/[,;\s]/);            }            Ext.each(names, function(name){                if(source.hasOwnProperty(name)){                    dest[name] = source[name];                }            }, this);            return dest;        },        destroy : function(){//清除对象属性,DOM节点            Ext.each(arguments, function(arg){                if(arg){                    if(Ext.isArray(arg)){                        this.destroy.apply(this, arg);                    }else if(Ext.isFunction(arg.destroy)){                        arg.destroy();                    }else if(arg.dom){                        arg.remove();                    }                    }            }, this);        },         destroyMembers : function(o, arg1, arg2, etc){            for(var i = 1, a = arguments, len = a.length; i < len; i++) {                Ext.destroy(o[a[i]]);                delete o[a[i]];            }        },        clean : function(arr){            var ret = [];            Ext.each(arr, function(v){                if(!!v){                    ret.push(v);                }            });            return ret;        },        unique : function(arr){            var ret = [],                collect = {};            Ext.each(arr, function(v) {                if(!collect[v]){                    ret.push(v);                }                collect[v] = true;            });            return ret;        },        getCmp : function(id){//获取组建对象            return Ext.ComponentMgr.get(id);        },        type : function(o){            if(o === undefined || o === null){                return false;            }            if(o.htmlElement){                return 'element';            }            var t = typeof o;            if(t == 'object' && o.nodeName) {                switch(o.nodeType) {                    case 1: return 'element';                    case 3: return (/\S/).test(o.nodeValue) ? 'textnode' : 'whitespace';                }            }            if(t == 'object' || t == 'function') {                switch(o.constructor) {                    case Array: return 'array';                    case RegExp: return 'regexp';                    case Date: return 'date';                }                if(typeof o.length == 'number' && typeof o.item == 'function') {                    return 'nodelist';                }            }            return t;        },        intercept : function(o, name, fn, scope){            o[name] = o[name].createInterceptor(fn, scope);        },        // internal        callback : function(cb, scope, args, delay){            if(Ext.isFunction(cb)){                if(delay){                    cb.defer(delay, scope, args || []);                }else{                    cb.apply(scope, args || []);                }            }        }  }})