adding numbers present in array without using sum function

RE: adding numbers present in array without using sum function

rishabhs0004 — Wed, 05 Jan 2022 05:21:50 GMT

Did you get the logic of Chris's code?

RE: adding numbers present in array without using sum function

vamsi krishna — Thu, 27 May 2021 06:14:12 GMT

instead of sum function, we can write our own rule to add two numbers using (+) sign

RE: adding numbers present in array without using sum function

avinashv252039 — Thu, 27 May 2021 03:41:12 GMT

but within reduce also we need to use fn!sum as predicate right

RE: adding numbers present in array without using sum function

vamsi krishna — Tue, 25 May 2021 06:57:16 GMT

you can use reduce() function

RE: adding numbers present in array without using sum function

vinayvarma — Tue, 25 May 2021 03:43:08 GMT

thank you for your answer actually i also agree with sum() but i had this question in my interview

RE: adding numbers present in array without using sum function

Chris — Wed, 12 May 2021 14:12:15 GMT

Agree, sum() function should be your go-to for "summing" an array.

But if you are looking to unnecessarily complicate your code, how about a recursive function to add an array of numbers.

Note with recursive rules, you must save them prior to testing.

/* 
rule!chris_add_recur(
  array: List of Integer
  index: Integer
  total: Integer
)
*/

a!localVariables(
  local!index: if(rule!APN_isEmpty(ri!index),1,ri!index),
  local!total: if(rule!APN_isEmpty(ri!total),0,ri!total),
  
  if(
    local!index>count(ri!array),
    ri!total,
    rule!chris_add_recur(
      array: ri!array,
      index: local!index+1,
      total: index(ri!array,local!index)+local!total
    )
  )
)

Call this rule with only the array input as:

rule!chris_add_recur(
  array: {1,2,3,4}
)

RE: adding numbers present in array without using sum function

Stefan Helzle — Wed, 12 May 2021 07:42:43 GMT

For what purpose? What is wrong with sum()?