jquery - jQuery计数数组中出现的次数

This question already has answers here:

How to count the number of occurrences of each item in an array? [duplicate]

(9个答案)


7年前关闭。




我想计算数组中每个元素的数量

例子:

 var basketItems = ['1','3','1','4','4'];

 jQuery.each(basketItems, function(key,value) {

 // Go through each element and tell me how many times it occurs, output this and remove duplicates

 }

然后我想输出

Item  |  Occurances
--------------------
1     |  2
3     |  1
4     |  2

提前致谢

最佳答案

您可以尝试:

var basketItems = ['1','3','1','4','4'],
    counts = {};

jQuery.each(basketItems, function(key,value) {
  if (!counts.hasOwnProperty(value)) {
    counts[value] = 1;
  } else {
    counts[value]++;
  }
});

结果:

Object {1: 2, 3: 1, 4: 2}

关于jquery - jQuery计数数组中出现的次数，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/22557502/