Lodash按属性排序/排序数组

Question

我有以下对象数组：

var tasks = [
   { importance: 'moderate', task: 'do laundry' },
   { importance: 'critical', task: 'brush teeth' },
   { importance: 'important', task: 'buy milk' },
   { importance: 'unimportant', task: 'wash car' },
];

如何使用lodash排序或排序函数按重要性级别排序我的数组？

Answer 1

你可以不用lodash这样做：

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var tasks = [
   { importance: 'moderate', task: 'do laundry' },
   { importance: 'critical', task: 'brush teeth' },
   { importance: 'important', task: 'buy milk' },
   { importance: 'unimportant', task: 'wash car' },
];

var priorityIndex = {unimportant: 1, moderate: 2, important: 3, critical: 4};

tasks.sort((a, b) =>  priorityIndex[a.importance] - priorityIndex[b.importance]);

console.log(tasks);

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Answer 2

首先，将importance值更改为可排序的值（例如整数）：

const critical    = 1;
const important   = 2;
const moderate    = 3;
const unimportant = 4;

var tasks = [
   { importance: moderate,    task: 'do laundry' },
   { importance: critical,    task: 'brush teeth' },
   { importance: important,   task: 'buy milk' },
   { importance: unimportant, task: 'wash car' },
];`

然后执行以下操作：

_.orderBy(tasks, ['importance'], ['asc']);