andre/30-seconds-of-code
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #175 from iamsoorena/edit-includes

Browse Source 
edit Array includes description
This commit is contained in:
Angelos Chalaris
2017-12-16 14:33:47 +02:00
committed by GitHub
parent fcac67cbd9 67f9684f80
commit 61aefd1cbc
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
snippets/array-includes.md
View File

@ -3,6 +3,7 @@
Use `slice()` to offset the array/string and `indexOf()` to check if the value is included. Use `slice()` to offset the array/string and `indexOf()` to check if the value is included.
Omit the last argument, `fromIndex`, to check the whole array/string. Omit the last argument, `fromIndex`, to check the whole array/string.
In [ES6](http://www.ecma-international.org/ecma-262/7.0/#sec-array.prototype.includes), you can use a similar native `.includes()` function.
```js ```js
const includes = (collection, val, fromIndex=0) => collection.slice(fromIndex).indexOf(val) != -1; const includes = (collection, val, fromIndex=0) => collection.slice(fromIndex).indexOf(val) != -1;
// includes("30-seconds-of-code", "code") -> true // includes("30-seconds-of-code", "code") -> true