Lists - index summation

Community Support
1

Hello there,

I am attempting to sum every term in a list to its associated index.

so;

list1: 5 2 4 8 5

desired result:

list1: 6 4 7 12 10

My approach would be to write a loop that keeps going until it has completed the ‘size’ of the list

while counter <= size

     list1[counter] == list1[counter] + counter

     counter++

end

However, I am unsure what the syntax for this in q is. Any help would be greatly appreaciated.

Thanks,

2

n.b. kdb+ uses index origin of 0

to get your desired output, a couple of ways:

q)list1+sums count[list1]#1b

6 4 7 12 10

q)list1+1+til count list1

6 4 7 12 10