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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javier171188vs.poacosta87

Add numbers of an array

Code
Diff
  • const addArr = (arr) => arr.reduce((acc,curr)=>acc+curr,0) || null;
    • const addArr = (arr) => {
    • let sum = 0;
    • for (let i = 0; i < arr.length; i++) {
    • sum += arr[i];
    • }
    • return sum || null;
    • };
    • const addArr = (arr) => arr.reduce((acc,curr)=>acc+curr,0) || null;
Gloria Bara vs.rishadharis

Basic Filtering 5 Not In (BIE)

Code
Diff
  • -- Code Here
SELECT*FROM transactions
WHERE store Not in ('BIE Store Jakarta',
'BIE Store Bandung');
    • --- Code Here
    • -- Code Here
    • SELECT*FROM transactions
    • WHERE store Not in ('BIE Store Jakarta',
    • 'BIE Store Bandung');
rubutarvs.rishadharis

Basic Select (BIE)

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

Are there three

Code
Diff
  • fn solution(mut 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,
    • }
    • 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
<Lee>vs.ReturnMaster

Return 100

Takes input of an integer or string and returns 100.

Code
Diff
  • def returnhundred(word):
    word = str(word)
    while len(word) < 4:
        word += "a"
    word = word[0:4]
    val = bin(len(word))
    return int(val[2:])
    • function returnhundred() {
    • return 10 ** 2;
    • }
    • def returnhundred(word):
    • word = str(word)
    • while len(word) < 4:
    • word += "a"
    • word = word[0:4]
    • val = bin(len(word))
    • return int(val[2:])
Marcos Adrianovs.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, a) {
    super(dom);
  }
}
    • class Component {
    • constructor(dom) {
    • console.log('Parent class constructor executed!');
    • this.dom = dom;
    • }
    • onCreate() {
    • return true;
    • }
    • }
    • class Collection {
    • //
    • class Collection extends Component {
    • constructor(dom, a) {
    • super(dom);
    • }
    • }
user578387

Hello, Ruby!

greet = "Hello Ruby!"

print           greet, "\n"
puts            greet
$stdout.write   greet +"\n"
$stdout.puts    greet
$stdout.print   greet, "\n"
ph02vs.rishadharis

Basic Select with Alias (BIE)

Code
Diff
  • SELECT customers.name nama, customers.age umur FROM customers
    • -- Code Here
    • SELECT customers.name nama, customers.age umur FROM customers