我想计算数组中每个元素的数量
示例:
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
答案 0 :(得分:7)
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}
答案 1 :(得分:3)
尝试
var basketItems = ['1','3','1','4','4'];
var returnObj = {};
$.each(basketItems, function(key,value) {
var numOccr = $.grep(basketItems, function (elem) {
return elem === value;
}).length;
returnObj[value] = numOccr
});
console.log(returnObj);
输出
Object { 1=2, 3=1, 4=2}