使用Javascript从Json对象获取最大值

Question

这应该很简单.我只是想不通.

如何使用javascript从这段JSON中获取最大值.

{"data":{"one":21,"two":35,"three":24,"four":2,"five":18},"meta":{"title":"Happy with the service"}}

我需要的关键和价值是:

"two":35 

因为它是最高的

谢谢

Answer 1

var jsonText = '{"data":{"one":21,"two":35,"three":24,"four":2,"five":18},"meta":{"title":"Happy with the service"}}'
var data = JSON.parse(jsonText).data
var maxProp = null
var maxValue = -1
for (var prop in data) {
  if (data.hasOwnProperty(prop)) {
    var value = data[prop]
    if (value > maxValue) {
      maxProp = prop
      maxValue = value
    }
  }
}

Answer 2

如果你有下划线:

var max_key = _.invert(data)[_.max(data)];

这是如何工作的:

var data = {one:21, two:35, three:24, four:2, five:18};
var inverted = _.invert(data); // {21:'one', 35:'two', 24:'three', 2:'four', 18:'five'};
var max = _.max(data); // 35
var max_key = inverted[max]; // {21:'one', 35:'two', 24:'three', 2:'four', 18:'five'}[35] => 'two'