javascript按字符串属性排序对象数组

Question

javascript按字符串属性排序对象数组

我试图通过属性对对象数组进行排序title.这是我正在运行的代码片段,但它没有排序任何东西.数组按原样显示.PS我看了以前类似的问题.例如,这里建议并使用我正在使用的相同方法.

javascript:

function sortLibrary() {
    // var library is defined, use it in your code
    // use console.log(library) to output the sorted library data
    console.log("inside sort");
    library.sort(function(a,b){return a.title - b.title;});
    console.log(library);
} 

// tail starts here
var library = [
    {
        author: 'Bill Gates',
        title: 'The Road Ahead',
        libraryID: 1254
    },
    {
        author: 'Steve Jobs',
        title: 'Walter Isaacson',
        libraryID: 4264
    },
    {
        author: 'Suzanne Collins',
        title: 'Mockingjay: The Final Book of The Hunger Games',
        libraryID: 3245
    }
];

sortLibrary();

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HTML代码:

<html>
<head>
    <meta charset="UTF-8">
</head>

<body>
<h1> Test Page </h1>
<script src="myscript.js"> </script>
</body>

</html>

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Answer 1

Alw*_*nny 7

你试过这样的吗？它按预期工作

library.sort(function(a,b) {return (a.title > b.title) ? 1 : ((b.title > a.title) ? -1 : 0);} );

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var library = [
    {
        author: 'Bill Gates',
        title: 'The Road Ahead',
        libraryID: 1254
    },
    {
        author: 'Steve Jobs',
        title: 'Walter Isaacson',
        libraryID: 4264
    },
    {
        author: 'Suzanne Collins',
        title: 'Mockingjay: The Final Book of The Hunger Games',
        libraryID: 3245
    }
];
console.log('before sorting...');
console.log(library);
library.sort(function(a,b) {return (a.title > b.title) ? 1 : ((b.title > a.title) ? -1 : 0);} );

console.log('after sorting...');
console.log(library);

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