Review.md

JAVASCRIPT

1. Duplicate

    Array.prototype.RemoveDuplicate = function(){
        return [...new Set(this)];
    }
    //-----------------
    Array.prototype.RemoveDuplicate = function(){
        var agent = [];
        this.forEach(function(element,index){
            if(this.indexOf(element) === index){
                agent.push(element);
            }
        });
        return agent;
    }

2. 查找共同的最近父节点

    function FindParentNode(node1,node2){
        if(node1.contains(node2))
        return node1;
        else if (node2.contains(node1))
        return node2;
        else return FindParentNode(node1.parentNode,node2);
    }

3. 获取URL的参数

    function getUrlParam(url,value){
        var param = url.split("?")[1];
        var result = [];
        if(value){
            var p = param.split("&");
            p.forEach(function(element,index){
                if(element.startWith(value))
                    result.push(element.split("=")[1]);
            })
            return result.length == 0 ? "" : result;
        }
        else  
    }

4.改变this的指向

    function bindthis(func,object){
       return function (){
           var param = Array.from(arguments);
           return func.apply(object,param);
       }
    }

5. 根据包名，在指定空间中创建对象

    function namespace(space,package){
        var pack = package.split(".");
        var parent = oNamespace ;
        for(var i = 0; i < package.length;i++){
            var property = package[i];
            if(typeof parent[property] !== "object")
            parent[property] = {};

            parent = parent[property];
        }
        return 
    }

6. 斐波那契

    function fi(n,first = 1, second =1){
        if(n<=2) return second;
        return fi(n-1,second,first+second);
    }

7. 找出数组中出现次数最多的一项并统计

       function FrequencyofArray(arr){
          var obj = {};
          var sum = 0;
          for(var i = 0;i<arr.length;i++){
              if(obj[arr[i]])
               obj[arr[i]] +=1;
               else obj[arr[i]] = 1;
          }
          for(var count in obj){
              if(obj[count]> sum)
              sum = obj[count];
              a = k;s
          }
           
       }
   
   class EventEmitter {
       constructor(){
           this.messageBox = {};
       }
       on(event,func){
           const callbacks= this.messageBox[event] || [];
           callbacks.push(func);
           this.messageBox[eventName] = callbacks;
       }
       emit(event,...args){
           const callbacks = this.messageBox[event];
           callbacks.forEach(function(callback){
               callback(...args);
           })
       }
       off(eventName, func) {
           const callbacks = this.messageBox[eventName];
           const index = callbacks.indexOf(func);
       if (index !== -1) {
           callbacks.splice(index, 1);
       }
   }
   }