index.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script src="http://libs.baidu.com/jquery/1.8.3/jquery.min.js"></script> <!--引入东师理想JS框架基础核心库--> <script src="dsFrameWork_Core.js"></script> </head> <body> </body> <script> $(function() { var ds = [ {"chat_id":"1111","chat_name":"1111","chat_type":"2"}, {"chat_id":"2222","chat_name":"2222","chat_type":"2"}, {"chat_id":"3333","chat_name":"3333","chat_type":"3"}, {"chat_id":"4444","chat_name":"4444","chat_type":"3"}, {"chat_id":"5555","chat_name":"5555","chat_type":"3"}]; var map1 = new ds_Array(ds,"chat_id"); //返回指定关键词相应的对象 var o=map1.getObject("5555"); //map1.changeTop("400329"); //console.log(obj2Str(ds)); //map1.changeBottom("400329"); console.log(obj2Str(ds)); map1.changePostion("2222","1111","before"); console.log(obj2Str(ds)); map1.changePostion("2222","5555","after"); console.log(obj2Str(ds)); }); </script> </html>
dsFrameWork_Core.js
/* * MAP对象,实现MAP功能 * * 接口: * size() 获取MAP元素个数 * isEmpty() 判断MAP是否为空 * clear() 删除MAP所有元素 * put(key, value) 向MAP中增加元素(key, value) * remove(key) 删除指定KEY的元素,成功返回True,失败返回False * get(key) 获取指定KEY的元素值VALUE,失败返回NULL * element(index) 获取指定索引的元素(使用element.key,element.value获取KEY和VALUE),失败返回NULL * containsKey(key) 判断MAP中是否含有指定KEY的元素 * containsValue(value) 判断MAP中是否含有指定VALUE的元素 * values() 获取MAP中所有VALUE的数组(ARRAY) * keys() 获取MAP中所有KEY的数组(ARRAY) * * 例子: * var map = new Map(); * * map.put("key", "value"); * var val = map.get("key") * …… * */ function Map() { this.elements = new Array(); //获取MAP元素个数 this.size = function() { return this.elements.length; } //判断MAP是否为空 this.isEmpty = function() { return(this.elements.length < 1); } //删除MAP所有元素 this.clear = function() { this.elements = new Array(); } //向MAP中增加元素(key, value) this.put = function(_key, _value) { this.elements.push( { key : _key, value : _value }); } //删除指定KEY的元素,成功返回True,失败返回False this.remove = function(_key) { var bln = false; try{ for(i = 0; i < this.elements.length; i++) { if(this.elements[i].key == _key) { this.elements.splice(i, 1); return true; } } } catch(e) { bln = false; } return bln; } //获取指定KEY的元素值VALUE,失败返回NULL this.get = function(_key) { try{ for(i = 0; i < this.elements.length; i++) { if(this.elements[i].key == _key) { return this.elements[i].value; } } } catch(e) { return null; } } //获取指定索引的元素(使用element.key,element.value获取KEY和VALUE),失败返回NULL this.element = function(_index) { if(_index < 0 || _index >= this.elements.length) { return null; } return this.elements[_index]; } //判断MAP中是否含有指定KEY的元素 this.containsKey = function(_key) { varbln = false; try{ for(i = 0; i < this.elements.length; i++) { if(this.elements[i].key == _key) { bln = true; } } } catch(e) { bln = false; } return bln; } //判断MAP中是否含有指定VALUE的元素 this.containsValue = function(_value) { var bln = false; try{ for(i = 0; i < this.elements.length; i++) { if(this.elements[i].value == _value) { bln = true; } } } catch(e) { bln = false; } return bln; } //获取MAP中所有VALUE的数组(ARRAY) this.values = function() { var arr = new Array(); for(i = 0; i < this.elements.length; i++) { arr.push(this.elements[i].value); } return arr; } //获取MAP中所有KEY的数组(ARRAY) this.keys = function() { var arr = new Array(); for(i = 0; i < this.elements.length; i++) { arr.push(this.elements[i].key); } return arr; } } function obj2Str(obj) { switch(typeof(obj)){ case ‘object‘: var ret = []; if (obj instanceof Array){ for (var i = 0, len = obj.length; i < len; i++){ ret.push(obj2Str(obj[i])); } return ‘[‘ + ret.join(‘,‘) + ‘]‘; } else if (obj instanceof RegExp){ return obj.toString(); } else{ for (var a in obj){ ret.push(a + ‘:‘ + obj2Str(obj[a])); } return ‘{‘ + ret.join(‘,‘) + ‘}‘; } case ‘function‘: return ‘function() {}‘; case ‘number‘: return obj.toString(); case ‘string‘: return "\"" + obj.replace(/(\\|\")/g, "\\$1").replace(/\n|\r|\t/g, function(a) {return ("\n"==a)?"\\n":("\r"==a)?"\\r":("\t"==a)?"\\t":"";}) + "\""; case ‘boolean‘: return obj.toString(); default: return obj.toString(); } } /*************************************************************************************************************/ /* 功能:扩展的东师理想自己的Map类型,传入一个JSON数据,和一个KEY字段, 在内存中生成两个Map对象,一个可以通过Key返回索引号,另一个可以通过Key返回实体对象 作者:黄海 时间:2014-07-31 用例: var ds = [ {"chat_id":"1111","chat_name":"1111","chat_type":"2"}, {"chat_id":"2222","chat_name":"2222","chat_type":"2"}, {"chat_id":"3333","chat_name":"3333","chat_type":"3"}, {"chat_id":"4444","chat_name":"4444","chat_type":"3"}, {"chat_id":"5555","chat_name":"5555","chat_type":"3"}]; var map1 = new ds_Array(ds,"chat_id"); //返回指定关键词相应的对象 var o=map1.getObject("5555"); map1.changeTop("400329"); map1.changeBottom("400329"); map1.changePostion("2222","1111","before"); map1.changePostion("2222","1111","after"); */ function ds_Array(json,key_field) { var Key_map,Object_map; var init=function() { Key_map = new Map(); Object_map = new Map(); $.each(json,function(i,n) { var o=eval(‘n.‘+key_field); Key_map.put(o,i); Object_map.put(o,n); }); } init(); this.getObject = function(_key) { return Object_map.get(_key); } this.changePostion = function(_key1,_key2,_dir) { var myIndex1,myObject1,myIndex2; switch(_dir) { case "after"://_dir:1 _key1向_key2 后 myIndex1=Key_map.get(_key1); myObject1=Object_map.get(_key1); myIndex2=Key_map.get(_key2); if(myIndex1>myIndex2) { json.splice(myIndex1,1); json.splice(myIndex2,0,myObject1); } else { json.splice(myIndex2+1,0,myObject1); json.splice(myIndex1,1); } break; case "before"://_dir:2 _key1向_key2 前 myIndex1=Key_map.get(_key1); myObject1=Object_map.get(_key1); myIndex2=Key_map.get(_key2); if(myIndex2>myIndex1) { json.splice(myIndex2,0,myObject1); json.splice(myIndex1,1); } else { json.splice(myIndex1,1); json.splice(myIndex2,0,myObject1); } break; } init(); } this.changeTop = function(_key) { //将_key1放到顶部 var myIndex=Key_map.get(_key); var myObject=Object_map.get(_key); //删除指定索引的对象 json.splice(myIndex,1); //放到第一个上 json.unshift(myObject); init(); } this.changeBottom=function(_key) { //将_key1放到底部 var myIndex=Key_map.get(_key); var myObject=Object_map.get(_key); //删除指定索引的对象 json.splice(myIndex,1); //放到最后一个上 json.push(myObject); init(); } }
扩展自己的数组核心库
时间: 2024-10-16 05:49:18