我需要你的帮助。 例如,我有这样的数组:
var array = [{
"name": "Tony",
"year": "2010"
}, {
"name": "Helen",
"year": "2010"
}, {
"name": "Jack",
"year": "2005"
}, {
"name": "Tony",
"year": "2008"
}, {
"name": "Max",
"year": "2005"
}];
我如何按年计算它们并得到这样的结果:
2010 = 2 times;
2005 = 2 times;
2008 = 1 time;
谢谢
最佳答案
检查这个fiddle
var countObj = {};
for( var counter = 0; counter < array.length; counter++ )
{
var yearValue = array [ counter ].year;
if ( !countObj[ yearValue ] )
{
countObj[ yearValue ] = 0;
}
countObj[ yearValue ] ++;
}
console.log( countObj );
关于javascript - 如何统计具有元素值的对象?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34352799/