按属性对对象数组进行排序（具有自定义顺序，而不是字母顺序）

Question

我想就这个小问题得到您的帮助。我想根据代码值而不是字母顺序对数组进行排序。 （我用粗体字指定了该名称，但最终还是被标记出来了，人们甚至都不在乎阅读该问题）例如，我想有所有绿色的对象，那么所有的蓝色的人，然后将所有的红色的。最好的方法是什么？[    { code: "RED", value: 0},    { code: "BLUE", value: 0},    { code: "RED", value: 0},    { code: "GREEN", value: 0},    { code: "BLUE", value: 0},    { code: "RED", value: 0},    { code: "GREEN", value: 0},    { code: "BLUE", value: 0}]使用sort函数可以做到这一点吗？在这种情况下会是什么情况？

Answer 1

首先设置自定义优先级

var codePriority = [ "GREEN", "BLUE", "RED" ];

现在使用相同的排序方式

arr.sort( function(a,b){ 

   if ( a.code == b.code ) return a.value - b.value;

   return codePriority.indexOf( a.code ) - codePriority.indexOf( b.code ) ; notice this line

})

演示版

var arr = [

    { code: "RED", value: 0},

    { code: "BLUE", value: 0},

    { code: "RED", value: 0},

    { code: "GREEN", value: 0},

    { code: "BLUE", value: 0},

    { code: "RED", value: 0},

    { code: "GREEN", value: 0},

    { code: "BLUE", value: 0}

];

var codePriority = [ "GREEN", "BLUE", "RED" ];

arr.sort( function(a,b){ 

   if ( a.code == b.code ) return a.value - b.value;

   return codePriority.indexOf( a.code ) - codePriority.indexOf( b.code )

});

console.log( arr );

Answer 2

您可以实现一个模式数组，并根据该模式数组中元素的索引进行排序。

const a = ['GREEN', 'BLUE', 'RED'];

const o = [{code:"RED",value:0},{code:"BLUE",value:0},{code:"RED",value:0},{code:"GREEN",value:0},{code:"BLUE",value:0},{code:"RED",value:0},{code:"GREEN",value:0},{code:"BLUE",value:0}];

const r = o.slice().sort(({ code: q }, { code: w }) => a.indexOf(q) - a.indexOf(w));

console.log(r);