colbydauph

const hookStreamWrite = (stream, callback) => {
  const oldWrite = stream.write;
  stream.write = callback((...args) => oldWrite.apply(stream, args));
  return () => {
    stream.write = oldWrite;
  };
};

/* Example */

colbydauph

// subscribe to online / offline events
// (bool -> undefined) -> () -> undefined
const subscribeOnline = (cb) => {
  const online = () => cb(true);
  const offline = () => cb(false);
  window.addEventListener('online', online, false);
  window.addEventListener('offline', offline, false);
  
  return function unsubscribe() {
    window.removeEventListener('online', online);

colbydauph

// @async File -> DataUrl
const fileDataUrl = (file) => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => resolve(reader.result);
    reader.onerror = reject;
    reader.readAsDataURL(file);
  });
}

colbydauph

// inverse of callbackify
exports.promisify = (func) => (...args) => {
  return new Promise((resolve, reject) => {
    func(...args, (err, data) => {
      err ? reject(err) : resolve(data);
    });
  });
};

// inverse of promisify

colbydauph

tag_commit:
      <<: *job_defaults
      
      environment:
          AWS_ACCOUNT_ID: 000000000000
          AWS_REGION: us-east-1
      
      steps:
        - <<: *setup_remote_docker
        

colbydauph

// const factorial = Y(f => n => n > 1 ? n * f(n - 1) : 1);
const Y = f => (x => x(x))(y => f(x => y(y)(x)));

colbydauph

package.json

"engines": { "node": "8.9.1" },
"scripts": {
  "version": "echo $npm_package_version",
  "node-version": "node -p 'require(\"./package.json\").engines.node'"
}

usage

colbydauph

Keybase proof

I hereby claim:

• I am colbydauph on github.
• I am colbydauphinais (https://keybase.io/colbydauphinais) on keybase.
• I have a public key ASDX29Uwv9FQnc_8pjKfZrPnWMroWUTG5eBX332iqSG51Qo

To claim this, I am signing this object: