Javascript: Unshift to second position of the array

Question

I understand this diagram:

But now my question is... How can I add an element just in the second position of the Array?

If I have this array: (A, C, G, T) and I want to add B...

The result that I want should be: (A, B, C, G, T)

Any suggestions?

Thank you!

score 13 · Accepted Answer · edited Nov 26 '15 at 21:10

13

What you want is the splice function:

arr.splice(index, 0, item); will insert item into arr at the specified index.

edited Nov 26 '15 at 21:10

vittore

answered Nov 26 '15 at 21:08

CoderPi

excelent! this is what I was searching for. Thank you! – omostan Mar 27 '20 at 16:35
arr.splice(1, 0, 'B'); – Hastig Zusammenstellen Aug 29 '20 at 16:35

1 Answers1