the-if-function

The 'if' function

• Completed at: 2023-06-02T02:50:28.873Z

• Completed languages: python

• Tags: Functional Programming, Fundamentals

• Rank: 8 kyu

Description

Create a function called _if which takes 3 arguments: a value bool and 2 functions (which do not take any parameters): func1 and func2

When bool is truthy, func1 should be called, otherwise call the func2.

Example:

_if(true, (() -> console.log 'true'), (() -> console.log 'false'))
// Logs 'true' to the console.

void the_true() { printf("true"); }
void the_false() { printf("false"); }
_if(true, the_true, the_false);
/* Logs "true" to the console */

the_true:
    mov rdi .true
    jmp printf
.true:   db  `true\0`

the_false:
    mov rdi, .false
    jmp printf
.false:  db  `false\0`

mov dil, 1
mov rsi, the_true
mov rdx, the_false
call _if            ; Logs "true" to the console

void TheTrue() { std::cout << "true" }
void TheFalse() { std::cout << "false" }
_if(true, TheTrue, TheFalse);
// Logs 'true' to the console.

Kata.If(true, () => Console.WriteLine("True"), () => Console.WriteLine("False"));
// write "True" to console

_if(true, fn -> IO.puts "true" end, fn -> IO.puts "false" end)
# prints "true" to the console

main = _if True (putStrLn "You spoke the truth") (putStrLn "liar")
-- puts "You spoke the truth" to the console.

_if False "Hello" "Goodbye" -- "Goodbye"

_if(true, function(){console.log("True")}, function(){console.log("false")})
// Logs 'True' to the console.

_if(true, proc{puts "True"}, proc{puts "False"})
# Logs 'True' to the console.

def truthy(): 
  print("True")
  
def falsey(): 
  print("False")
  
_if(True, truthy, falsey)
# prints 'True' to the console

_if(true, || println!("true"), || println!("false"))
# prints "true" to the console

kata._if(true, function() print("true") end, function() print("false") end)
-- prints "true" to the console

Kata._if(true, () -> System.out.println("true"), () -> System.out.println("false"));
// prints "true" to the System out.