我如何過濾JavaScript對象並獲得所需的輸出作爲數組？

Question

[ 
    {imgUrl: "A"}, 
    {imgUrl: "B"}, 
    {imgUrl: "C", file: {fileName: "D"} } 
] 

所需的輸出= [「A」，「B」，「D」];

Answer 1

var obj=[ 
     {imgUrl: "A"}, 
     {imgUrl: "B"}, 
     {imgUrl: "C", file: {fileName: "D"} } 
     ]; 
    var y=obj.map(function(z) 
    { 

     if(typeof(z.file) !== 'undefined') 
     { 
     return z.file.fileName; 

     } 
     else 
     { 
      return z.imgUrl; 
     } 
    }); 

y is your desired array. 

Answer 2

使用Array.prototype.map()和一些條件來處理您的要求。

array.map((value) => { 
    if (value.file && value.file.fileName) { 
    return value.file.fileName; 
    } 

    return value.imgUrl; 
});