javascript - 使用保存键按属性值对 Javascript 对象数组进行排序

Question

如何使用保留字符串键按属性“成本”对对象数组进行排序？

开始数组:

aparts: {
    apart1 : {id: "1", status: 2, cost: 10033450},
    apart2 : {id: "2", status: 2, cost: 5214000},
    apart3 : {id: "3", status: 2, cost: 7314300},
    apart4 : {id: "4", status: 1, cost: 9261700}    
}

要数组:

aparts: {
    apart2 : {id: "2", status: 2, cost: 5214000},
    apart3 : {id: "3", status: 2, cost: 7314300},
    apart4 : {id: "4", status: 1, cost: 9261700},
    apart1 : {id: "1", status: 2, cost: 10033450}   
}

Answer 1

不保证属性的顺序。参见，例如:

https://stackoverflow.com/a/5525820/1250301

如果你想要有序的东西，那么你需要使用数组。转换非常简单:

var aparts = {
    apart1 : {id: "1", status: 2, cost: 10033450},
    apart2 : {id: "2", status: 2, cost: 5214000},
    apart3 : {id: "3", status: 2, cost: 7314300},
    apart4 : {id: "4", status: 1, cost: 9261700}    
};

var arr = Object.keys(aparts).map(function(k) { return aparts[k]; }).sort(function(a,b) { return a.cost - b.cost });

console.log(arr);