6 Sum of positive

8kyu Tantangan #6/366 - 20 Feb 2024

https://www.codewars.com/kata/5715eaedb436cf5606000381

6.1 Instruction

You get an array of numbers, return the sum of all of the positives ones.

Example [1,-4,7,12] => 1 + 7 + 12 = 20

Note: if there is nothing to sum, the sum is default to 0.

6.2 YouTube Video

6.3 Solution Code

Solusi bar-bar

positive_sum <- function(vec){
  pos_vec <- c()
  for(i in vec){
    if(i > 0){
      pos_vec <- c(pos_vec, i)
    } else {
      pos_vec <- c(pos_vec, 0)
    } 
  }
  return(sum(pos_vec))
}

Solusi simple

positive_sum <- function(vec){
  vec[vec < 0] <- 0
  sum(vec)
}

positive_sum <- function(vec)sum(vec[vec>0])

6.4 Test

library(testthat)

test_that('Basic tests', {
  expect_equal(positive_sum(c(1,2,3,4,5)),15)
  expect_equal(positive_sum(c(1,-2,3,4,5)),13)
  expect_equal(positive_sum(c(-1,2,3,4,-5)),9)
  expect_equal(positive_sum(c()),0)
  expect_equal(positive_sum(c(-1,-2,-3,-4,-5)),0)
})

Test passed 😀

6.5 Supported by