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

Update vectorDistance.md

Browse Source
This commit is contained in:
Angelos Chalaris
2019-02-25 08:30:33 +02:00
committed by GitHub
parent 3e7f17aefc
commit 2c39c8a362
1 changed files with 6 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
snippets/vectorDistance.md
View File

@ -1,17 +1,17 @@
### VectorDistance ### vectorDistance
Returns the distance between two vectors. Returns the distance between two vectors.
Use `Array.prototype.reduce()`,`Math.pow()` and `Math.sqrt()` to calculate the Euclidean distance between two vectors. Use `Array.prototype.reduce()`, `Math.pow()` and `Math.sqrt()` to calculate the Euclidean distance between two vectors.
```js ```js
const vectorDistance = (...coords) => { const vectorDistance = (...coords) => {
let pointLength = Math.trunc(coords.length/2); let pointLength = Math.trunc(coords.length / 2);
let sum = coords.slice(0,pointLength).reduce((accumulator,currentValue,currentIndex) => accumulator + (Math.pow(currentValue-coords[pointLength+currentIndex],2)),0); let sum = coords.slice(0, pointLength).reduce((acc, val, i) => acc + (Math.pow(val - coords[pointLength + i], 2)), 0);
return Math.sqrt(sum); return Math.sqrt(sum);
} };
``` ```
```js ```js
vectorDistance(10,0,5,20,0,10) //11.180339887498949 vectorDistance(10, 0, 5, 20, 0, 10); // 11.180339887498949
``` ```