我知道以前也有人问过类似的问题,但这个问题有点不同。我有一个未命名对象的数组,其中包含一个命名对象的数组,我需要得到其中“name”为“string 1”的对象。下面是一个示例数组。

var array = [
    { name:"string 1", value:"this", other: "that" },
    { name:"string 2", value:"this", other: "that" }
];

更新:我应该早点说,但一旦我找到它,我想用一个编辑过的对象替换它。


当前回答

查找数组元素:

令arr = [ {name:"string 1", value:"this", other: "that"}, {name:"string 2", value:"this", other: "that"} ]; 令obj = arr。Find (o => o.name === 'string 1'); console.log (obj);


替换数组元素:

令arr = [ {name:"string 1", value:"this", other: "that"}, {name:"string 2", value:"this", other: "that"} ]; 令obj = arr。Find ((o, i) => { If (o.name === 'string 1') { Arr [i] = {name: '新字符串',value: 'this', other: 'that'}; 返回true;//停止搜索 } }); console.log (arr);

其他回答

另一种方法(帮助@NullUserException和@Wexoni的注释)是在数组中检索对象的索引,然后从那里开始:

var index = array.map(function(obj){ return obj.name; }).indexOf('name-I-am-looking-for');
// Then we can access it to do whatever we want
array[index] = {name: 'newName', value: 'that', other: 'rocks'};

使用findWhere方法:

var array = [
    { name:"string 1", value:"this", other: "that" },
    { name:"string 2", value:"this", other: "that" }
];


var result = _.findWhere(array, {name: 'string 1'});

console.log(result.name);

请参见JSFIDDLE

你可以用一个简单的循环来实现:

var obj = null;    
for (var i = 0; i < array.length; i++) {
    if (array[i].name == "string 1") {
        obj = array[i];
        break;
    }
}

用foreach:

let itemYouWant = null;
array.forEach((item) => {
    if (item.name === 'string 1') {
        itemYouWant = item;
    }
});
console.log(itemYouWant);

如果有地图就更好了:

const itemYouWant = array.map((item) => {
    if (item.name === 'string 1') {
        return item;
    }
    return null;
});
console.log(itemYouWant);

查找数组元素:

令arr = [ {name:"string 1", value:"this", other: "that"}, {name:"string 2", value:"this", other: "that"} ]; 令obj = arr。Find (o => o.name === 'string 1'); console.log (obj);


替换数组元素:

令arr = [ {name:"string 1", value:"this", other: "that"}, {name:"string 2", value:"this", other: "that"} ]; 令obj = arr。Find ((o, i) => { If (o.name === 'string 1') { Arr [i] = {name: '新字符串',value: 'this', other: 'that'}; 返回true;//停止搜索 } }); console.log (arr);