TWO SUM

Question

Given an array of integers nums and an integer target , return indices of the two numbers such that they add up to target . 
 You may assume that each input would have exactly one solution , and you may not use the same element twice. 
 You can return the answer in any order. 
 
 Example 1: 
 Input: nums = [2,7,11,15], target = 9
 Output: [0,1]
 Explanation: Because nums[0] + nums[1] == 9, we return [0, 1].

Srishti Jain · Accepted Answer

a!localVariables(
 local!num: { 2, 7, 11, 15 },
 local!target:9,
 local!n: {a!forEach(
 items: local!num,
 expression: fv!item + a!forEach(
 items: union(local!num, fv!item),
 expression: fv!item
 )
 )},
 local!loop: a!forEach(items: local!n,
 expression: wherecontains(local!target,tointeger(fv!item))
 ),
 touniformstring(local!loop)
)

Dave Lewis · Answer

a!localVariables(
 local!numbs: {2,7,11,15},
 local!target: 9,
 reject(
 a!isNullOrEmpty(_),
 a!forEach(
 items: local!numbs,
 expression: if(
 fv!item > local!target,
 null,
 wherecontains(local!target - fv!item, local!numbs)
 )
 )
 )
) 
 It works aside from Appian arrays index starting at 1. Uses only 1 forEach loop, and should be able to handle multiple correct answers. 15 lines just like the other. =/

TWO SUM

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