我知道以前也有人问过类似的问题,但这次有点不同。我有一个未命名对象的数组,其中包含一个已命名对象的数组,我需要获取"name“是"string 1”的对象。下面是一个数组示例。
var array = [
{ name:"string 1", value:"this", other: "that" },
{ name:"string 2", value:"this", other: "that" }
];
我应该早点说的,但是一旦我找到它,我想用一个编辑过的对象来替换它。
发布于 2012-09-17 23:23:36
您可以遍历数组并测试该属性:
function search(nameKey, myArray){
for (var i=0; i < myArray.length; i++) {
if (myArray[i].name === nameKey) {
return myArray[i];
}
}
}
var array = [
{ name:"string 1", value:"this", other: "that" },
{ name:"string 2", value:"this", other: "that" }
];
var resultObject = search("string 1", array);
发布于 2012-09-17 23:24:48
查找数组元素:
let arr = [
{ name:"string 1", value:"this", other: "that" },
{ name:"string 2", value:"this", other: "that" }
];
let obj = arr.find(o => o.name === 'string 1');
console.log(obj);
替换数组元素:
let arr = [
{ name:"string 1", value:"this", other: "that" },
{ name:"string 2", value:"this", other: "that" }
];
let obj = arr.find((o, i) => {
if (o.name === 'string 1') {
arr[i] = { name: 'new string', value: 'this', other: 'that' };
return true; // stop searching
}
});
console.log(arr);
发布于 2016-07-21 17:34:37
在ES6中,您可以像这样使用Array.prototype.find(predicate, thisArg?)
:
array.find(x => x.name === 'string 1')
http://exploringjs.com/es6/ch_arrays.html#_searching-for-array-elements https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/find
然后,要替换上述对象(并使用另一个很酷的ES6方法fill
),您可以这样做:
let obj = array.find(x => x.name === 'string 1');
let index = array.indexOf(obj);
array.fill(obj.name='some new string', index, index++);
https://stackoverflow.com/questions/12462318
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