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Difference between arrays

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Angelos Chalaris
2017-12-09 17:24:34 +02:00
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README.md
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* [Capitalize first letter](#capitalize-first-letter) * [Capitalize first letter](#capitalize-first-letter)
* [Count occurences of a value in array](#count-occurences-of-a-value-in-array) * [Count occurences of a value in array](#count-occurences-of-a-value-in-array)
* [Current URL](#current-url) * [Current URL](#current-url)
* [Difference between arrays](#difference-between-arrays)
* [Distance between two points](#distance-between-two-points) * [Distance between two points](#distance-between-two-points)
* [Even or odd number](#even-or-odd-number) * [Even or odd number](#even-or-odd-number)
* [Factorial](#factorial) * [Factorial](#factorial)
@ -86,6 +87,15 @@ Use `window.location.href` to get current URL.
var currentUrl = _ => window.location.href; var currentUrl = _ => window.location.href;
``` ```
### Difference between arrays
Use `filter()` to remove values that are not part of `values`, determined using `indexOf()`.
```js
var difference = (arr, values) =>
arr.filter(v => values.indexOf(v) === -1);
```
### Distance between two points ### Distance between two points
Use `Math.pow()` and `Math.sqrt()` to calculate the Euclidean distance between two points. Use `Math.pow()` and `Math.sqrt()` to calculate the Euclidean distance between two points.

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snippets/difference-between-arrays.md Normal file
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### Difference between arrays
Use `filter()` to remove values that are not part of `values`, determined using `indexOf()`.
```js
var difference = (arr, values) =>
arr.filter(v => values.indexOf(v) === -1);
```