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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Sonahitvs.ReturnMaster

Return 100

What if i like to write

Code
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  • function returnhundred() {
  return 1 +
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    1;
}
    • function returnhundred() {
    • return 10 ** 2;
    • return 1 +
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    • 1 +
    • 1;
    • }
xcthulhu

Thread UNSafe with-out-str

When you have a thread ouputting to stdout, and you want to catch its output in a test case...

(defmacro with-out-str-not-thread-safe
  "A version of clojure.core/with-out-str that is not thread-safe"
  [& body]
  `(let [s# (StringWriter.)]
     (with-redefs [*out* s#]
       ~@body
       (str s#))))
jhoffner

Ruby Redis example

Redis
NoSQL
Databases

A basic example of how to run a Redis in ruby on CW.

fork do
  exec "redis-server"
end

require 'redis'
r = Redis.new

r.set('a', 'b')
chalenqovs.poacosta87

Add numbers of an array

Code
Diff
  • const addArr = arr => arr.reduce((a, b) => a + b, 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((a, b) => a + b, 0) || null
xcthulhu

Hello world racket!

(display "Hello, world!")