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                            ## **判斷一個字符串中出現次數最多的字符，統計這個次數**
```
var str = 'asdfssaaasasasasaa';
var json = {};
for (var i = 0; i < str.length; i++) {
    if(!json[str.charAt(i)]){
       json[str.charAt(i)] = 1;
    }else{
       json[str.charAt(i)]++;
    }
};
var iMax = 0;
var iIndex = '';
for(var i in json){
    if(json[i]>iMax){
         iMax = json[i];
         iIndex = i;
    }
}        
console.log('出現次數最多的是:'+iIndex+'出現'+iMax+'次');
```
結果如下：出現次數最多的是:a出現9次
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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