如何使用JavaScript/jquery仅获取多维数组中的唯一项? [英] How to get only unique items in a multidimensional array with JavaScript/jquery?

问题描述

例如，我得到了一个具有2维的多维数组项. 我从数据库中获得了这个数组，但是它最多可以填充2600+个对象，但是如果我能知道它的独特性，它将大约有30个对象.怎么解决呢?

I got for example a multidimensional array items with 2 dimensions. I get this array from a database, but it will fill up to 2600+ objects, but if i could some how unique this it would be around 30 objects. How to solve this?

设置为: 我如何获取信息:

The set up is: How i get the information:

$.getJSON(url1,function(data1)
{
    for (var i in data1.layers){
        $.each(data1.layers[i].legend, function( a, b ) {
            for(var a in data1.layers[i].legend[a]){
                $.each(data1.layers[i].legend, function( key, val ){
                    items.push({label: val.label, url: "long link" + val.url});
                });
            };
        });     
    };

items[0].label  
items[0].url 
items[1].label    
items[1].url

等...

我在php中找到了另一个关于此的stackoverflow页面，但是我无法在JavaScript/JQuery中使它工作. Stackoverflow php解决方案

I found another stackoverflow page about this in php, but i can't get it to work in JavaScript/JQuery. Stackoverflow php solution

推荐答案

使用词典查看您已经拥有的项目:

Use a dictionary to see which item you have already:

var dict = {};

$.getJSON(url1,addToLocalArray);

function addToLocalArray(data1){

  for (var i in data1.layers){

    $.each(data1.layers[i].legend, function( a, b ) {

        for(var a in data1.layers[i].legend[a]){

            $.each(data1.layers[i].legend, function( key, val ){

              if(!dict[val.url+'-'+val.label]){
                // or create some sort of unique hash for each element...
                dict[val.url+'-'+val.label] = 1;

                items.push({label: val.label, url: "long link" + val.url});
              }

            });

        }
    });
  }
}

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