Finding Pairs with Target Sum

This function takes a list of numbers and a target sum as input, and returns a list containing a pair of numbers whose sum equals the target sum. If no such pair is found, it returns None.

Technology Stack : Built-in data types (list, dictionary)

Code Type : Function

Code Difficulty : Intermediate

                
                    
def sum_pairs(numbers, target_sum):
    seen = {}
    for number in numbers:
        complement = target_sum - number
        if complement in seen:
            return [seen[complement], number]
        seen[number] = number
    return None