使用ES6 Map(非常支持)，你可以尝试这样做:

Var arr = [ {key: 'foo'， val: 'bar'}， {key: 'hello'， val: 'world'} ]; var result = new Map(arr。Map (i => [i。键,i.val])); //当使用TypeScript时，需要指定type: // var result = arr.map((i): [string, string] => [i]。键,i.val]) //不幸的是，映射字符串化不好。这是数组形式的内容。 console.log("Result is: " + JSON.stringify([…Result])); // Map {"foo" => "bar"， "hello" => "world"}

使用简单的Javascript

var createMapFromList = function(objectList, property) {
    var objMap = {};
    objectList.forEach(function(obj) {
      objMap[obj[property]] = obj;
    });
    return objMap;
  };
// objectList - the array  ;  property - property as the key

使用lodash，这可以使用keyBy:

var arr = [
    { key: 'foo', val: 'bar' },
    { key: 'hello', val: 'world' }
];

var result = _.keyBy(arr, o => o.key);

console.log(result);
// Object {foo: Object, hello: Object}

使用ES6 spread + Object.assign:

array = [{key: 'a', value: 'b', redundant: 'aaa'}, {key: 'x', value: 'y', redundant: 'zzz'}]

const hash = Object.assign({}, ...array.map(s => ({[s.key]: s.value})));

console.log(hash) // {a: b, x: y}

以下是我在javascript中创建的一个小片段，将对象数组转换为哈希映射，由对象的属性值索引。您可以提供一个函数来动态计算散列映射的键(运行时)。

function isFunction(func){
    return Object.prototype.toString.call(func) === '[object Function]';
}

/**
 * This function converts an array to hash map
 * @param {String | function} key describes the key to be evaluated in each object to use as key for hasmap
 * @returns Object
 * @Example 
 *      [{id:123, name:'naveen'}, {id:345, name:"kumar"}].toHashMap("id")
        Returns :- Object {123: Object, 345: Object}

        [{id:123, name:'naveen'}, {id:345, name:"kumar"}].toHashMap(function(obj){return obj.id+1})
        Returns :- Object {124: Object, 346: Object}
 */
Array.prototype.toHashMap = function(key){
    var _hashMap = {}, getKey = isFunction(key)?key: function(_obj){return _obj[key];};
    this.forEach(function (obj){
        _hashMap[getKey(obj)] = obj;
    });
    return _hashMap;
};

你可以在这里找到要点:https://gist.github.com/naveen-ithappu/c7cd5026f6002131c1fa

减少使用的一个小改进:

var arr = [
    { key: 'foo', val: 'bar' },
    { key: 'hello', val: 'world' }
];

var result = arr.reduce((map, obj) => ({
    ...map,
    [obj.key] = obj.val
}), {});

console.log(result);
// { foo: 'bar', hello: 'world' }