var your_array=[5,5,5,3,3,2,5];
var counts = {};
your_array.forEach(function(x) { counts[x] = (counts[x] || 0)+1; });
document.write(counts[5])
--------------
4
文章標籤
全站熱搜
- 6月 18 週四 201514:21
javascript 計算array值重複次數
var your_array=[5,5,5,3,3,2,5];
var counts = {};
your_array.forEach(function(x) { counts[x] = (counts[x] || 0)+1; });
document.write(counts[5])
--------------
4