如何用哈希排序此数组? [英] How to sort this array with hashes?

问题描述

可能重复:
如何对一组JavaScript对象进行排序?

Possible Duplicate:
How to sort an array of javascript objects?

我的输出看起来像这样:

I have output that looks like this:

[ { value: 1, count: 1 }, { value: 2, count: 2 } ]

我需要遍历数组中的哈希值，然后返回具有最高计数的值数字.看起来很简单，但我有些困惑.我尝试过使用单独的数组保存两组值，但是我不知道执行此操作的最佳方法.

I need to iterate through hashes in the array and then return the value number which has the highest count. Seems simple but I'm a bit stumped. I've tried using a separate array to save both sets of values but I can't figure out the best way to do it.

推荐答案

您可以执行以下操作:

var a = [{
    value: 1,
    count: 1
}, {
    value: 2,
    count: 2
}, {
    value: 7,
    count: 8
}, {
    value: 5,
    count: 0
}, {
    value: 10,
    count: 3
}];

// sorting using a custom sort function to sort the 
// greatest counts to the start of the array
// take a look here: http://www.w3schools.com/jsref/jsref_sort.asp
// to understand how the custom sort function works
// better references can be found 
// here: http://es5.github.com/#x15.4.4.11
// and here: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/sort
a.sort( function( v1, v2 ){
    return v2.count - v1.count;
});

for ( var i in a ) {
    console.log( a[i] );
}

// the greatest one is the first element of the array
var greatestCount = a[0];

console.log( "Greatest count: " + greatestCount.count );

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