How to assign values to the correct array index?

Question

Is it possible when I want to assign values to the correct index in array (array in bash)? when I enter some number I want that this number was on the same position as its value..

example: when I enter number 25 and then use command echo ${array[25]} I expect 25

I want to give numbers from shuf -i 1-49 -n 7 | xargs -n7 to array. Every number on his position.

Thanks for answers :)

You want to create a sparse array of seven random values each assigned to its index value? — Etan Reisner
– Etan Reisner, Commented Dec 26, 2014 at 16:02
Can you explain why you'd want this? If I enter 25, why pull up ${a[25]} just to get the value of 25? It's certainly not very efficient. Imagine if I define array foo, then said foo[1000]='bar'. I'd be taking up 1001 memory locations. There might be a better way to do what you want. — David W.
– David W., Commented Dec 26, 2014 at 18:02

user000001 · Accepted Answer · 2014-12-26 16:05:23Z

1

You could just loop over the result of shuf:

#!/bin/bash
while read i
do
  a[$i]=$i
done < <( shuf -i 1-49 -n 7 )

for i in "${!a[@]}"; do
  printf "%s\t%s\n" "$i" "${a[$i]}"
done

answered Dec 26, 2014 at 16:05

user000001

33.8k14 gold badges86 silver badges113 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to assign values to the correct array index?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related