Start a new Kumite
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Kumite (ko͞omiˌtā) is the practice of taking techniques learned from Kata and applying them through the act of freestyle sparring.

You can create a new kumite by providing some initial code and optionally some test cases. From there other warriors can spar with you, by enhancing, refactoring and translating your code. There is no limit to how many warriors you can spar with.

A great use for kumite is to begin an idea for a kata as one. You can collaborate with other code warriors until you have it right, then you can convert it to a kata.

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ryanmovementvs.rishadharis

Basic Select 2 (BIE)

Code
Diff
  • -- Code Here
SELECT name, age FROM customers;
    • --- Code Here
    • -- Code Here
    • SELECT name, age FROM customers;
RHEZADarvs.rishadharis

Basic Select (BIE)

Code
Diff
  • select * from customers
    • -- Code here
    • select * from customers
Kedacivs.TheFimerCode

Return 100

Code
Diff
  • def return_hundred():
    return 0xFF ^ 0x9B
    • def return_hundred():
    • return 10000000000000000000000000000000 - 9999999999999999999999999999900
    • return 0xFF ^ 0x9B
multinationalitydudevs.aw3r1se

Calculate the nth Fibonacci number

Recursion
Mathematics
Code
Diff
  • function fibonacci(n) {
    return n <= 1 ? n : fibonacci(n - 1) + fibonacci(n - 2);
}
    • function fibonacci(n) {
    • if (n <= 1) return n;
    • return fibonacci(n - 1) + fibonacci(n - 2);
    • return n <= 1 ? n : fibonacci(n - 1) + fibonacci(n - 2);
    • }
TadaHrdvs.kellda

Flip the number

Code
Diff
  • fn flip_the_number(x: &u64) -> u64 {
    let reversed_str: String = x.to_string().chars().rev().collect();
    let reversed_u64: u64 = reversed_str.parse().unwrap();
    reversed_u64
}
    • fn flip_the_number(x: &u64) -> u64 {
    • let mut x = *x;
    • let mut y = 0;
    • while x != 0 {
    • y = y * 10 + x % 10;
    • x /= 10;
    • }
    • y
    • let reversed_str: String = x.to_string().chars().rev().collect();
    • let reversed_u64: u64 = reversed_str.parse().unwrap();
    • reversed_u64
    • }
FriedAxonsvs.kieren_mcgill

Check Even Number

Refactor the previous function body to one line.

Code
Diff
  • function isEven(num) {
  return num % 2 === 0 ? true : num % 1 === 0 ? false : undefined;
}
// isEven(2);


// Previous iteration

// isEven = number => number %2 === 0 ? 
//   true: number %1 === 0 ? 
//   false : undefined;
    • isEven = number => number %2 === 0 ?
    • true: number %1 === 0 ?
    • false : undefined;
    • function isEven(num) {
    • return num % 2 === 0 ? true : num % 1 === 0 ? false : undefined;
    • }
    • // isEven(2);
    • // Previous iteration
    • // isEven = number => number %2 === 0 ?
    • // true: number %1 === 0 ?
    • // false : undefined;
cyberninja2004vs.Roua99

double value

Code
Diff
  • #include<iostream>

int doubleValue(int x) {
    return x + x;
}
    • #include<iostream>
    • int doubleValue(int x) {
    • return x * 2;
    • return x + x;
    • }
cyberninja2004vs.televisionia

Area of a Triangle

Code
Diff
  • float AreaOfTriangle(float w, float h) {return (w * h) * 0.5;}
    • float AreaOfTriangle(float w, float h) {return (w * h) / 2;} //Get one-lined
    • float AreaOfTriangle(float w, float h) {return (w * h) * 0.5;}
JamesReichvs.Imunsure

XasanboyAb's Kumite #3

Code
Diff
  • const greet = () => 'Hello World!';
    • function Greet(){return "Hello World!"}
    • const greet = () => 'Hello World!';
MicSawvs.Micheaaa

Ulysses vs. Terrence - Remove every Third Character

Code
Diff
  • const removeEveryThird = str => str[0]+[...str].filter((a,i)=> i%3!==0).join('')
    • function removeEveryThird(str) {
    • return (str[0] || '') + str
    • .slice(1)
    • .replace(/(..)./g, '$1')
    • }
    • const removeEveryThird = str => str[0]+[...str].filter((a,i)=> i%3!==0).join('')