kevgathuku

class DummyController < ApplicationController
  def do
    render json: { balance: 50 }
  end
end

kevgathuku

How to add an image to a gist

1. Create a gist if you haven't already.
2. Clone your gist:

   # make sure to replace `<hash>` with your gist's hash
   git clone https://gist.github.com/<hash>.git # with https
   git clone git@gist.github.com:<hash>.git     # or with ssh

kevgathuku

files:
  # If this file is edited, it must be removed from EC2 instance prior to deploy.
  "/opt/elasticbeanstalk/hooks/appdeploy/pre/09_yarn_install.sh" :
    mode: "000775"
    owner: root
    group: users
    content: |
      #!/usr/bin/env bash

      set -xe

kevgathuku

type tree = Leaf | Node(int, tree, tree);

let rec sum = (item) => {
  switch (item) {
  | Leaf => 0
  | Node(value, left, right) => value + sum(left) + sum(right);
  }
};

let rec height = (root) => {

kevgathuku

function iframeURLChange(iframe, callback) {
    var lastDispatched = null;

    var dispatchChange = function () {
        var newHref = iframe.contentWindow.location.href;

        if (newHref !== lastDispatched) {
            callback(newHref);
            lastDispatched = newHref;
        }

kevgathuku

import React from 'react';
import logo from './logo.svg';
import './App.css';

// Add these two imports
import Elm from 'react-elm-components';
import Main from "./Main";

function App() {
  return (

kevgathuku

-- Extracted from: https://guide.elm-lang.org
-- Read more about this program in the official Elm guide:
-- https://guide.elm-lang.org/architecture/buttons.html

module Main exposing (main)

import Browser
import Html exposing (Html, button, div, text)
import Html.Events exposing (onClick)

kevgathuku

// https://stackoverflow.com/a/30638226
// When printing an “Element” Chrome developer tools will request the 'id' property
// If the 'id' property is fetched, then the devtools is open
let checkStatus;
let customElement = document.createElement('p');

document.body.appendChild(customToString);

let element = new Image();
Object.defineProperty(element, 'id', {

kevgathuku

componentDidUpdate(prevProps, prevState) {
  Object.entries(this.props).forEach(([key, val]) =>
    prevProps[key] !== val && console.log(`Prop '${key}' changed`)
  );
  Object.entries(this.state).forEach(([key, val]) =>
    prevState[key] !== val && console.log(`State '${key}' changed`)
  );
}

kevgathuku

(defn compute-collatz [num steps]
  (cond
     (= num 1) steps
     (even? num) (compute-collatz (/ num 2) (inc steps))
     (odd? num)  (compute-collatz (+ 1 (* num 3)) (inc steps))))


(defn collatz [num]
  {:pre [(pos? num)]}
  (compute-collatz num 0))