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]
  ; Check if the provided number is positive. If not throw an error
  (if

kevgathuku

import React from 'react';
import EventComponent from './EventComponent';
import { mount } from 'enzyme';
import {
  createStartTouchEventObject,
  createMoveTouchEventObject
} from './EventHelpers.js';

describe('EventComponent', () => {

kevgathuku

module Main exposing (main)

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


type alias Model =
    { count : Int }

kevgathuku

let arr = [];
for (var i = 0; i < 10; i++) {
  arr.push(function() {console.log(i)});
}

let x = 0;
while (x < 10) {
  arr[x]();
  x++;
}

kevgathuku

Mocking an imported function to return different values for different tests

In the top level:

import getVisibleDays from 'react-dates/lib/utils/getVisibleDays';

jest.mock('react-dates/lib/utils/getVisibleDays', () => {
  const moment = require('moment');
  return jest.fn().mockReturnValue({
 '2018-01': [

kevgathuku

bundle exec rake db:drop db:create db:schema:load RAILS_ENV=test

kevgathuku

Deploying from circleci2.0 to Heroku

Resources:

• circleci 2.0 docs
• Managing SSH Keys on Heroku

Steps:

Prerequisites:

• Heroku CLI installed on your computer
• A project deployed to Heroku

kevgathuku

To get the npm cache folder, run npm config get cache

kevgathuku

## Sort Algorithms in Elixir

# Selection Sort

defmodule Selection do
  def sort(list) when is_list(list) do
    do_selection(list, [])
  end

  def do_selection([head|[]], acc) do

kevgathuku

import _ from 'underscore';
import fetch from 'isomorphic-fetch'

class API {
  getCSRFToken() {
    return _.find(document.getElementsByTagName('meta'), (meta) => {
      return meta.name === 'csrf-token'
    }).content
  }