Get object from array by specifc index using variable

Question

I have 1 variable and 1 array. The array contains any number of numbers, from 0 to 10 - like such: 0,1,2,3,4,5 and so on.

My variable contains 1 number, let's say 4 - I want to use the variable to get the number at index 4 in the array, minus 1. So in the above examples, I would get 2.

How can I go about creating a variable with that number? I have tried:

var goBack = $(userBack2).index(place-1);

Where goBack is the variable I am creating, userBack2 is the array containing my numbers and place is my variable determining what index I need.

I know that the syntax is completely wrong, that index might not be correct to use here, but I simply cannot figure out how to do it. Do I need to use filter? if so, how?

alert(ar[variable - 1])?

u_mulder
– u_mulder

2016-06-19 18:41:56 +00:00
Commented Jun 19, 2016 at 18:41 — u_mulder
– u_mulder, Commented Jun 19, 2016 at 18:41
var goBack = userBack2[place-1];

Pranav C Balan
– Pranav C Balan

2016-06-19 18:42:01 +00:00
Commented Jun 19, 2016 at 18:42 — Pranav C Balan
– Pranav C Balan, Commented Jun 19, 2016 at 18:42

Pranav C Balan · Accepted Answer · 2016-06-19 18:42:48Z

1

Simply get value from array using bracket notation

var goBack = userBack2[place - 1];

answered Jun 19, 2016 at 18:42

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Pranav C Balan

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Comments

Alongkorn · Accepted Answer · 2016-06-19 18:46:28Z

1

I think that you don't need to use jquery anymore. Native javascript is enough.

var items = [0, 1, 2, ..., 10];
var num = 4;
var goBack = items[num - 1];

answered Jun 19, 2016 at 18:46

Alongkorn

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