使用下划线排序 [英] sortby using Underscore

问题描述

我正在尝试使用下划线 _.sortby() 函数对某些记录进行排序.我的要求是以 _ 开头的名称给予更高的优先级.例如.如果我的代码是

I am trying to sort certain records using underscore _.sortby() function . My requirement is to give higher priority for names starting with _ . For eg . if my code is

var patients = [
    [{name: 'John', roomNumber: 1, bedNumber: 1}],
    [{name: 'Lisa', roomNumber: 1, bedNumber: 2}],
    [{name: '_A', roomNumber: 2, bedNumber: 1}],
    [{name: 'Omar', roomNumber: 3, bedNumber: 1}]
];
var sortedArray = _.sortBy(patients, function(patient) {
    return patient[0].name;
});

我希望记录 _A, roomNumber: 2, bedNumber: 1 位于顶部.从某种意义上说，我希望排序忽略以 _

I would want to have the record _A, roomNumber: 2, bedNumber: 1 to be on the top . In a sense I want the sort to ignore the strings starting with _

推荐答案

试试这个代码.

var patients = [
    [{name: '_John', roomNumber: 1, bedNumber: 1}],
    [{name: 'Lisa', roomNumber: 1, bedNumber: 2}],
    [{name: '_A', roomNumber: 2, bedNumber: 1}],
    [{name: 'Amar', roomNumber: 3, bedNumber: 1}]
];

var sortedByChar = _.sortBy(patients, function(patient) {
  
  return (patient[0].name.indexOf('_') != 0) ? patient[0].name[0] : patient[0].name[1];
  
});

var finalArray = _.sortBy(sortedByChar, function(patient) {
  return (patient[0].name.indexOf('_') != 0); 
});

alert(JSON.stringify(finalArray));

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>

您可以通过在其他名称上添加下划线来玩弄小提琴，看看它是如何排序的.

You can play around with the fiddle by adding underscores to other names and see how it sorts.

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