[Solved] What is the use of [0] in the following code?

Question

I was trying this code from Stackoverflow which prints all permutations in an array.. Although i didn't get the meaning/use of [0] in the line ch = input.splice(i, 1)[0];

I tried removing [0] from the code.. Still it works.. So what does it do?

Question link:
https://stackoverflow.com/questions/9960908/permutations-in-javascript

https://code.sololearn.com/W0fSZAyWnGuf/?ref=app

Answer 1

It may be helpful!

array.splice(index, howmany, item1, ....., itemX)

Check it

https://www.w3schools.com/jsref/jsref_splice.asp

Answer 2

Thank you for your answers 「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」
ⒺⓃⒺⓂⓎ
Kevin Star

Edit :Tried JSON.stringify..now it's clear...

Answer 3

It's not doing the same.
Try this:
console.log(JSON.stringify(val))
to see the difference.
The reason is what 「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」 explained.

Answer 4

Abbou Saad that wasn't the same refer to Kevin's answer and happy to help's answer ..

Answer 5

Splice return array n your array have one element so it's the same