Javascript字母分组 [英] Javascript alphabetical grouping

问题描述

我有一个对象的json数组，如下所示:{id:'the id', name:'the name'};，我需要遍历该数组，并按其name属性按字母顺序对每个对象进行分组.有没有一种方法，而无需使用带有每个字母的switch/if语句?

I have a json array of objects that look like this: {id:'the id', name:'the name'}; and I need to loop over the array and group each object alphabetically by it's name attribute. Is there a way to do this without using a switch / if statement with every letter in it?

我不想做的事情是这样的:

What I don't want to do is something like this:

if(data[i].name..slice(0, 1) == 'a') {
   ...
}

这是一个大型数组，其中包含近1,000个对象.我的目标是最终将他们添加到潜水中，这样看起来像这样:

It's a large array, with almost a 1,000 objects in it. My goal is eventually append them to a dive so it looks something like this:

• 4品脱
• 4个饼干

• 苹果
• 亚历克斯
• 亚当

• 鲍勃
• 比利

推荐答案

您可以像这样循环遍历您的收藏集:

you can loop throught your collections like this:

var groupedCollection = {};   
for(...){//loop throug collection         
    var firstLetter = data[i].charAt(0);
    if(groupedCollection[firstLetter] == undefined){             
        groupedCollection[firstLetter] = [];         
    }         
    groupedCollection[firstLetter].push(data[i]);     
}
//groupedCollection now contait data in the form of {a: [], b:[], etc...}

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