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/**
 * A JavaScript utility that can be used to determine what function
 * and file your function was called from. Useful for debugging
 * large/complex codebases.
 *
 * @returns {{
 *   fnName: string | void;
 *   filePath: string;
 *   lineNumber: number;
 *   columnNumber: number;

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// ==UserScript==
// @name         jupyter notebook page follow
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  Add 'page follow' feature to jupyter notebook pages
// @author       Chris Deacy
// @match        http*://*/notebook*/*
// @downloadURl  https://gist.github.com/chrisdothtml/51c2b5ca2dc9c498fe27d0d464b47801/raw/JupyterPageFollower.user.js
// @updateURl    https://gist.github.com/chrisdothtml/51c2b5ca2dc9c498fe27d0d464b47801/raw/JupyterPageFollower.user.js
// @grant        none

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#!/bin/bash

###
# Usage example:
# 
# . "path/to/discoverable_bash.sh"
# 
# import { indent_lines } from './_utils.sh'
# call '../bins/start.sh' "foo"
###

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Octave CheatSheet

GNU Octave is a high-level interpreted language, primarily intended for numerical computations.
(via GNU Octave)

Basics

• not equal ~=
• logical AND &&

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/*
 * Get fixed issue references from GitHub pull request body
 */
function getIssueRefs(pullRequestBody, defaultRepoName) {
  // ref: https://help.github.com/en/articles/closing-issues-using-keywords
  const keywords = 'close|closed|closes|fix|fixed|fixes|resolve|resolved|resolves';
  // ref: https://help.github.com/en/articles/autolinked-references-and-urls#issues-and-pull-requests
  const refTypes = [
    // #000
    '#',

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Setup

1. Download script

curl https://gist.githubusercontent.com/chrisdothtml/509fdbe3bfec1a11bbc346e4b44c3604/raw/switch-npmrc.js > "$HOME/switch-npmrc.js"

2. Add alias to .bash_profile or similar

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function getPipedInput () {
  return new Promise(resolve => {
    let result = ''

    process.stdin.resume()
    process.stdin.setEncoding('utf8')
    process.stdin.on('data', chunk => (result += chunk))
    process.stdin.on('end', () => resolve(result))
  })
}

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/*
 * Calculate the persistence of a number;
 * based on Numberphile video:
 * https://www.youtube.com/watch?v=Wim9WJeDTHQ
 */
function calculatePersistence (num) {
  let result = 1
  while ((num = multiplyItems(getDigits(num))) > 0)
    result++
  return result

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/**
 * Indicates whether the sum of the factors of a number
 * are equal to the number
 * https://en.wikipedia.org/wiki/Perfect_number
 * 
 * @param {Number} num
 * @returns {Boolean}
 */
function isPerfectNumber (num) {
  const numRoot = Math.sqrt(num)

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/**
 * Get all factors of a number
 * 
 * @param {Number} num
 * @returns {Set}
 */
function getFactors (num) {
  const numRoot = Math.sqrt(num)
  const isEven = num % 2 === 0
  const incr = isEven ? 1 : 2