在條件數組中選擇對象並生成新數組javascript

-1

我有一個如下所示的數據數組。我想選擇x === 1和name ===「Dog」的對象，然後將它們推送到一個新的數組中。 arr2是我期待的結果。感謝你的幫助！在條件數組中選擇對象並生成新數組javascript

var arr1 = [   
      {y:2.5, x:1, name: "Dog"}, 
      {y:2.7, x:1, name: "Dog"}, 
      {y:2.7, x:1, name: "Dog"}, 
      {y:3.1, x:1, name: "Dog"}, 
      {y:2.7, x:2, name: "Dog"}, 
      {y:2.6, x:2, name: "Dog"}, 
      {y:3.0, x:2, name: "Dog"}, 
      {y:2.9, x:2, name: "Dog"}, 

      {y:3.0, x:0.7, name: "Cat"}, 
      {y:3.0, x:0.7, name: "Cat"}, 
      {y:3.1, x:0.7, name: "Cat"}, 
      {y:3.0, x:0.7, name: "Cat"}, 
      {y:2.9, x:2.3, name: "Cat"}, 
      {y:2.8, x:2.3, name: "Cat"}, 
      {y:2.7, x:2.3, name: "Cat"}, 
      {y:2.8, x:2.3, name: "Cat"}, 

      {y:2.5, x:1, name: "Dog"}, 
      {y:2.4, x:1, name: "Dog"}, 
      {y:2.5, x:1, name: "Dog"}, 
      {y:3.5, x:1, name: "Dog"}, 
      {y:2.7, x:2, name: "Dog"}, 
      {y:2.6, x:2, name: "Dog"}, 
      {y:2.8, x:2, name: "Dog"}, 
      {y:2.9, x:2, name: "Dog"} 
      ] 

    var arr2 = [ 

        {y:2.5, x:1, name: "Dog"}, 
        {y:2.7, x:1, name: "Dog"}, 
        {y:2.7, x:1, name: "Dog"}, 
        {y:3.1, x:1, name: "Dog"}, 
        {y:2.5, x:1, name: "Dog"}, 
        {y:2.4, x:1, name: "Dog"}, 
        {y:2.5, x:1, name: "Dog"}, 
        {y:3.5, x:1, name: "Dog"} 


]

我想這一點，但它不工作：

for (var i = 0; i < arr1.length; i++) { 
    if (arr1[i].x === 1 && arr1[i].name === "Dog"){ 
    return ****; 
    arr2.push(***) 
    } 
    }

來源

2016-01-13 newb

你想要做什麼['.filter（）']（https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter ）是。 – Pointy

這應該很容易通過網絡搜索獲得一些方向 – charlietfl

嘗試以下

var arr2 = arr1.filter(function(item){ 
    return item.x === 1 && item.name === "Dog" 
});

如果arr2已經存在，那麼你可以使用數組拼接

arr2.concat(arr1.filter(function(item){ 
    return item.x === 1 && item.name === "Dog" 
}));

供參考ence - Array filter

來源

2016-01-13 18:27:20 nikhil

我認爲他需要將結果連接到array2。如果是： '''arr2.concat（arr1.filter（function（item）{ return item.x === 1 && item.name ===「Dog」 }））;''' – ema

@ema - OP提到了新的數組，因此排除了串聯部分。但是，正如你所提到的那樣，我也會加入這個作爲解決方案的一部分 – nikhil

在條件數組中選擇對象並生成新數組javascript

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