Javascript:访问数组内部对象的属性 [英] Javascript: Accessing Property of Objects Inside an Array

问题描述

如何从下面的数据集1中获取整数"100"?

How can I get the integer "100" from dataset1 [below]?

    var dataset1 = [ 
            {video_name: "Apples", video_views: 100},
            {video_name: "Oranges", video_views: 35},
            {video_name: "Grapes", video_views: 20},
            {video_name: "Avocados", video_views: 85},
            {video_name: "Tomatoes", video_views: 60}
        ]

推荐答案

如果要基于视频名称观看视频，则需要遍历数组并找到它.

If you want video views based on video name, you'll need to loop through the array and find it.

var dataset1 = [ 
    {video_name: "Apples", video_views: 100},
    {video_name: "Oranges", video_views: 35},
    {video_name: "Grapes", video_views: 20},
    {video_name: "Avocados", video_views: 85},
    {video_name: "Tomatoes", video_views: 60}
]

var searchCriteria = {video_name: "Apples"};
var searchResult;

//This loop sets searchResult to the LAST element in the set that meets the criteria

dataset1.forEach(function(obj){
    var matches = true;
    for (var key in searchCriteria){
        if (searchCriteria[key] !== obj[key]){
            matches = false;
        }
    }
    if (matches){
        searchResult = obj;
    }
});

console.log(searchResult);

或者您可以使用下划线之类的库来执行相同的操作，而无需查看循环

or you could use a library like Underscore to do the same thing, but without having to look at the loop.

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