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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abubakar13vs.rishadharis

Basic Select 2 (BIE)

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

Basic Select with Alias (BIE)

Code
Diff
  • SELECT name AS Nama,age AS Umur FROM customers;
    • -- Code Here
    • SELECT name AS Nama,age AS Umur FROM customers;
pristiandewiabbyvs.rishadharis

Basic Select (BIE)

Code
Diff
  • select * from customers;
    • -- Code here
    • select * from customers;
CenTdemeern1vs.ashsun

Are there three

Why was this i32 mutable?
Also, you don't need to turn this into an iterator...

Code
Diff
  • fn solution(x: i32) -> bool {
    x.to_string().contains('3')
}
    • fn solution(mut x: i32) -> bool {
    • match x.to_string().chars().into_iter().position(|s| s == '3') {
    • Some(_t) => true,
    • _e => false,
    • }
    • fn solution(x: i32) -> bool {
    • x.to_string().contains('3')
    • }
user1389114vs.nitinaggarwal1986

Prime Checker [Optimized]

Mathematics
Algorithms
Logic
Numbers
Code
Diff
  • def prime_checker(n):
    if n in [2, 3, 5]:
        return True
    elif n % 2 == 0 or n % 3 == 0 or n % 5 == 0:
        return False
    
    a = int(n ** 0.5 / 30)
    b = [7, 11, 13, 17, 19, 23, 29, 31]
    
    for i in [30 * j for j in range(a + 1)]:
        if True in [n % (i + q) == 0 for q in b if i + q is not n]:
            return False
    return True
    • """
    • https://en.wikipedia.org/wiki/Primality_test
    • This one has lesser tests or usage of % operator.
    • An alternative using primality mod 30 = 2 * 3 * 5 instead of 6 = 2 * 3
    • """
    • def prime_checker(n):
    • if n in [2, 3, 5]:
    • return True
    • elif n % 2 == 0 or n % 3 == 0 or n % 5 == 0:
    • return False
    • a = int(n ** 0.5 / 30)
    • b = [7, 11, 13, 17, 19, 23, 29, 31]
    • for i in [30 * j for j in range(a + 1)]:
    • if True in [n % (i + q) == 0 for q in b if i + q is not n]:
    • return False
    • return True
hakr14vs.ReturnMaster

Return 100

returnhundred

Code
Diff
  • def returnhundred():
    r,e,t,u,r,n,h,u,n,d,r,e,d = [ord(returnhundred) for returnhundred in "returnhundred"]
    return h-u*n%d&r-e^d
    • function returnhundred() {
    • return 10 ** 2;
    • }
    • def returnhundred():
    • r,e,t,u,r,n,h,u,n,d,r,e,d = [ord(returnhundred) for returnhundred in "returnhundred"]
    • return h-u*n%d&r-e^d
Marcos Adrianovs.moraga

Property Shorthand

Code
Diff
  • const title = 'UOL - O melhor conteúdo';

const share = {
  fb: {
    title
  },
  twitter: {
    tweet: title
  }
};
    • var title = 'UOL - O melhor conteúdo';
    • const title = 'UOL - O melhor conteúdo';
    • var share = {
    • const share = {
    • fb: {
    • title: title
    • title
    • },
    • twitter: {
    • tweet: title
    • }
    • };
rods25vs.moragaFailed Tests

Criando e executando uma Promise com async/await

Code
Diff
  • async function a() {
  return 'ok';
}

async function b() {
   let res = await a();
}
    • function a() {
    • return new Promise(function (resolve, reject) {
    • resolve('ok');
    • });
    • async function a() {
    • return 'ok';
    • }
    • function b() {
    • a().then(function(res) {
    • console.log(res);
    • }).catch(function(err) {
    • console.log(err);
    • })
    • }
    • async function b() {
    • let res = await a();
    • }
esamaralvs.moraga

Concatenar listas

Code
Diff
  • const main = () => {

  let a = [1, 2, 3];
  
  let b = [4, 5, 6];
  
  let c = [7, 8, 9];

  // converter para ES6
  var d = [...a, ...b, ...c]
  
  return d.join(',');
}
    • const main = () => {
    • let a = [1, 2, 3];
    • let b = [4, 5, 6];
    • let c = [7, 8, 9];
    • // converter para ES6
    • var d = a.concat(b).concat(c);
    • var d = [...a, ...b, ...c]
    • return d.join(',');
    • }
rods25vs.moraga

Sobrescrevendo o constructor da classe base

Code
Diff
  • class Component {
  constructor(dom) {
    console.log('Parent class constructor executed!');
    this.dom = dom;
  }
  
  onCreate() {
    return true;
  }
}

class Collection extends Component{
  // 
  constructor(dom, bas) {
    super(dom);
    
    this.bas = bas;
  }
}
    • class Component {
    • constructor(dom) {
    • console.log('Parent class constructor executed!');
    • this.dom = dom;
    • }
    • onCreate() {
    • return true;
    • }
    • }
    • class Collection {
    • class Collection extends Component{
    • //
    • constructor(dom, bas) {
    • super(dom);
    • this.bas = bas;
    • }
    • }