javascript根据搜索词查找对象

Question

我需要使用搜索词对象搜索对象数组，并在数组中获取结果索引。

假设我有一个这样的数组:

[
  {
    name: "Mary",
    gender: "female",
    country: "USA",
    orientation: "straight",
    colorChoice: "red",
    shoeSize: 7
  },
  {
    name: "Henry",
    gender: "male",
    country: "USA",
    orientation: "straight",
    colorChoice: "red",
  },
  {
    name: "Bob",
    colorChoice: "yellow",
    shoeSize: 10
  },
  {
    name: "Jenny",
    gender: "female",
    orientation: "gay",
    colorChoice: "red",
  }
]

现在我需要在数组中搜索:

{
  gender: "female"
}

并得到结果:

[ 0, 3 ]

搜索对象可以是任意长度:

{
  gender: "female",
  colorChoice: "red"
}

什么是搜索数组最干净、最高效的方法？

谢谢。

Answer 1

思路是这样的:

function getFemales(myArr){
 var i = myArr.length, ret = [];
 while (i--){
  if ('gender' in myArr[i] && myArr[i].gender === 'female') {
    ret.push(i);
  }
 }
 return ret.sort();
}

参见 jsfiddle

更通用:

function findInElements(elArray, label, val){
 var i = elArray.length, ret = [];
 while (i--){
  if (label in elArray[i] && elArray[i][label] === val) {
    ret.push(i);
  }
 }
 return ret.sort();
}

参见 jsfiddle