18 Convert a String to a Number!

8kyu Tantangan #18/366 - 03 Mar 2024

https://www.codewars.com/kata/57356c55867b9b7a60000bd7

18.1 Instruction

Note: This kata is inspired by Convert a Number to a String!. Try that one too.

Description We need a function that can transform a string into a number. What ways of achieving this do you know?

Note: Don’t worry, all inputs will be strings, and every string is a perfectly valid representation of an integral number.

Examples

"1234" --> 1234
"605"  --> 605
"1405" --> 1405
"-7" --> -7

18.2 YouTube Video

18.3 Solution Code

string_to_number <- function(x){
  as.numeric(x)
}

string_to_number <- as.numeric

18.4 Test

library(testthat)

test_that('Basic tests', {
  expect_equal(string_to_number("1234"), 1234)
  expect_equal(string_to_number("605"), 605)
  expect_equal(string_to_number("1405"), 1405)
  expect_equal(string_to_number("-7"), -7)
})

Test passed 😸

18.5 Supported by