js 实现 c# 中的数据字典(dictionary)功能

男娘i 2022-04-11 11:41 286阅读 0赞

在高级语言c\#中存在 dictinary 这种key : value 的存储结构，但在js中没有这种现成的结构，只有数组这种结构，改编就是对数组的操作，实现 dictionary 的增删改查。看完代码你们可以试着写一个List

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/**
     * 字典
     */
    
    
    　  function dictionary() {
        　　this.count=0;
            this.keys = new Array();
            this.values = new Array();
        }
    
        dictionary.prototype.containKey=function(key){
            var index = this.checkKeyId(key);
            if(index != -1)
            {
                return true;
            }
            return false;
        },
    
        dictionary.prototype.add=function(key,value){
            var index = this.checkKeyId(key);
            if(index != -1)
            {
                //print(key + " is exit");
                //alert(key + " is exit");
                console.log(key + " is exit");
                return;
            }       
            this.keys[this.count] = key;
            this.values[this.count] = value;
            ++this.count;
            // console.log(key+":"+value);
        },
    
        dictionary.prototype.remove=function(key){
            var index = this.checkKeyId(key);
            if(-1==index)
            {
                console.log(key+" does not exist");
                return;
            }
            this.keys.splice(index,1);
            this.values.splice(index,1);
            --this.count;
        }
    
        dictionary.prototype.get=function(key){
            var index = this.checkKeyId(key);
            if(-1==index)
            {
                console.log(key+" does not exist:");
                return null;
            }
            return this.values[index];
        }
    
        dictionary.prototype.checkKeyId=function(key){
            for(i=0;i<this.count;i++)
            {
                if(key==this.keys[i])
                {
                    return i;
                }
            }
            return -1;
        }
    
        dictionary.prototype.getNameByIndex = function(index)
        {
            return this.keys[index];
        }
    
    module.exports = dictionary;