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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Marcos Adrianovs.moraga

Deep matching e default values

Code
Diff
  • const results = [
  {materia: {conteudo: {titulo: 'São Paulo'}}, tags: [1, 2, 3]},
  {materia: {conteudo: {}}, tags: [3, 2]},
  {materia: {conteudo: {titulo: 'Rio de Janeiro'}}, tags: [3, 2]},
];

for (const {materia: {conteudo: {titulo = 'Brasil'}}} of results) console.log(titulo);
    • let results = [
    • const results = [
    • {materia: {conteudo: {titulo: 'São Paulo'}}, tags: [1, 2, 3]},
    • {materia: {conteudo: {}}, tags: [3, 2]},
    • {materia: {conteudo: {titulo: 'Rio de Janeiro'}}, tags: [3, 2]},
    • ];
    • for (const result of results) {
    • let titulo = result.materia.conteudo.titulo || 'Brasil';
    • console.log(titulo);
    • }
    • for (const {materia: {conteudo: {titulo = 'Brasil'}}} of results) console.log(titulo);
victorteixeiravs.moraga

Method shorthand e computed property names

Code
Diff
  • // reescreva usando ES6

var prop = 'myProp';

var obj = {
  [prop]: 123,
  myFunc() {
    return this[prop];
  } 
};

obj.myProp;
    • // reescreva usando ES6
    • var prop = 'myProp';
    • var obj = {
    • myFunc: function() {
    • [prop]: 123,
    • myFunc() {
    • return this[prop];
    • }
    • };
    • obj[prop] = 123;
    • obj.myProp;
rods25vs.moraga

Template Literals

Code
Diff
  • var bg = 'gray'

var css = `
  <style>
  body { 
    background: ${bg};
    color: black;
  } 
  </style>`
    • var bg = 'gray';
    • var bg = 'gray'
    • var css = '' +
    • '<style>' +
    • 'body {' +
    • ' background: '+ bg + ';' +
    • ' color: black;'
    • '}' +
    • '</style>';
    • var css = `
    • <style>
    • body {
    • background: ${bg};
    • color: black;
    • }
    • </style>`
rods25vs.moraga

Parâmetros opcionais em funções

Code
Diff
  • // reescreva em ES6
function main(a, b = 2, c = 3) {
    return a * b * c;
}
    • // reescreva em ES6
    • function main(a, b, c) {
    • if (typeof b == 'undefined')
    • b = 2;
    • if (typeof c == 'undefined')
    • c = 3
    • function main(a, b = 2, c = 3) {
    • return a * b * c;
BlakeeTatsvs.coolcoder7892

Multiply and Add One

removed an entire line

Code
Diff
  • def multiply_and_add_one(a, b):
    return a * b + 1
    • def multiply_and_add_one(a, b):
    • r = a * b
    • return r + 1
    • return a * b + 1
Jackknife2342vs.psychodox

Digit to text

Code
Diff
  • function digitToText(digit) {
  const nums = {0: 'zero', 1: 'one', 2: 'two', 3:'three', 4:'four', 5:'five', 6:'six', 7:'seven', 8:'eight', 9:'nine'}
  return nums[digit]
}
    • const nums = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
    • function digitToText(digit) {
    • const nums = {0: 'zero', 1: 'one', 2: 'two', 3:'three', 4:'four', 5:'five', 6:'six', 7:'seven', 8:'eight', 9:'nine'}
    • return nums[digit]
    • }
daryna.plrsvs.an171

Sum of odd numbers in a rang

Code
Diff
  • function sumNechet(a, b) {
  let sum = 0;
  for (let i = a; i <= b; i++) {
    if (i % 2 !== 0) sum += i;
  }
  return sum;
}
    • function sumNechet(a, b) {
    • let sum = 0;
    • for (let i = a; i <= b; i++) {
    • if (i % 2 !== 0) sum += i;
    • }
    • return sum;
    • }
    • function нечетное(число) {
    • }
nachorojo2015vs.qcarlin

Add numbers of an array

Esta solucion es clave, tenela en cuenta pa.

Code
Diff
  • function addArr(arr){
  return arr.reduce((num,acc)=>num+acc,0) || null
}
    • function addArr(arr){
    • if(arr.length === 0) return null
    • let final = 0
    • arr.forEach(num => {
    • final += num
    • })
    • return final
    • return arr.reduce((num,acc)=>num+acc,0) || null
    • }
Gloria Bara vs.rishadharis

Basic Filtering 7 Is (BIE)

Code
Diff
  • -- Code Here
select*from transactions
where customer is NULL;
    • --- Code Here
    • -- Code Here
    • select*from transactions
    • where customer is NULL;