如果数组值包含一些字符串，如何过滤它

Question

我有一个数组，看起来像这样

[ { day: 'Friday', time: '14-16 Free' },
 { day: 'Friday', time: '16-18 Free' },
 { day: 'Friday', time: '18-20 Free' },
 { day: 'Friday', time: '20-22 Fully booked' } ]

我想过滤掉其中不包含 'Free' 的任何值，我尝试了长度但它没有用，有人可以向我解释为什么吗？

var array = [ { day: 'Friday', time: '14-16 Free' },
     { day: 'Friday', time: '16-18 Free' },
     { day: 'Friday', time: '18-20 Free' },
     { day: 'Friday', time: '20-22 Fully booked' } ];
console.log(array.filter((e) => e.time === (e.time.length < 11)));

Answer 1

请尝试 Array.prototype.indexOf：

let data = [ 
 { day: 'Friday', time: '14-16 Free' },
 { day: 'Friday', time: '16-18 Free' },
 { day: 'Friday', time: '18-20 Free' },
 { day: 'Friday', time: '20-22 Fully booked' }
];

let result = data.filter((e) => e.time.indexOf('Free') === -1);

console.log(result); // [{day: "Friday", time: "20-22 Fully booked"}]

Plunker 是 here。

Answer 2

使用 ES6 的 includes() 尝试以下操作：

var array = [ { day: 'Friday', time: '14-16 Free' },
     { day: 'Friday', time: '16-18 Free' },
     { day: 'Friday', time: '18-20 Free' },
     { day: 'Friday', time: '20-22 Fully booked' } ];

var res = array.filter((e) => (!(e.time.includes('Free'))));
console.log(res)

如果数组值包含一些字符串，如何过滤它

How to filter an array value if it containes some string

javascript

arrow-functions

filterfunction