與值作爲索引

Question

的陣列組對象我在

[{"name":"ABC", 
"type":123 
}, 
{"name":"ABC", 
"type":111 
}, 
{"name":"ABC", 
"type":1432 
}, 
{"name":"XYZ", 
    "type":523 
}, 
{"name":"XYZ", 
    "type":52 
}]; 

我想創建與數組的索引位置的分組對象的格式的輸出

示例輸出：

{ 
"ABC":[0,1,2], 
"XYZ":[3,4] 
} 

Answer 1

你可以組由它和name推動指數。

var array = [{ name: "ABC", type: 123 }, { name: "ABC", type: 111 }, { name: "ABC", type: 1432 }, { name: "XYZ", type: 523 }, { name: "XYZ", type: 52 }], 
 
    result = array.reduce(function (r, a, i) { 
 
     (r[a.name] = r[a.name] || []).push(i); 
 
     return r; 
 
    }, Object.create(null)); 
 
    
 
console.log(result);

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Answer 2

這可以用Array#reduce()

var array = [{ 
 
    "name": "ABC", 
 
    "type": 123 
 
    }, 
 
    { 
 
    "name": "ABC", 
 
    "type": 111 
 
    }, 
 
    { 
 
    "name": "ABC", 
 
    "type": 1432 
 
    }, 
 
    { 
 
    "name": "XYZ", 
 
    "type": 523 
 
    }, 
 
    { 
 
    "name": "XYZ", 
 
    "type": 52 
 
    } 
 
]; 
 

 
var groups = array.reduce((o,a,i)=>{ 
 
    o[a.name]=o[a.name]||[]; 
 
    o[a.name].push(i); 
 
    return o; 
 
}, {}); 
 

 
console.log(groups);

.as-console-wrapper { max-height: 100% !important; top: 0; }

在一個班輪你將有

var groups = array.reduce((o,a,i)=>(o[a.name]=o[a.name]||[],o[a.name].push(i),o),{}); 

Answer 3

在這裏你去：

var newObj=[]; 
var digitArray=[]; 
var myObj=[{"name":"ABC", 
"type":123 
}, 
{"name":"ABC", 
"type":111 
}, 
{"name":"ABC", 
"type":1432 
}, 
{"name":"XYZ", 
"type":523 
}, 
{"name":"XYZ", 
"type":52 
}]; 
for (var i=0; i<=myObj.length-1; i++){ 
    digitArray = (""+myObj[i].type).split(""); 
    newObj[myObj[i].name]=digitArray; 
} 
console.log(newObj); 

https://jsfiddle.net/9jd9rdgg/