gangadharjannu

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

gangadharjannu

1. Install Termux, an Android terminal emulator that provides a Linux execution environment and various tools.

2. Update system packages in Termux:

   $ pkg update -y

   

gangadharjannu

import ethers, {
  Contract,
  providers as Providers,
  utils as Utils,
  Wallet,
  ContractFactory
} from "ethers"

import path from "path"
import fs from "fs"

gangadharjannu

HTML 5 Microphone Visualizer

Forked from Zachary Skalko's Pen HTML 5 Microphone Visualizer.

A Pen by Radian on CodePen.

License.

gangadharjannu

/*
 * Easing Functions - inspired from http://gizma.com/easing/
 * only considering the t value for the range [0, 1] => [0, 1]
 */
EasingFunctions = {
  // no easing, no acceleration
  linear: function (t) { return t },
  // accelerating from zero velocity
  easeInQuad: function (t) { return t*t },
  // decelerating to zero velocity

gangadharjannu

#!/usr/bin/env bash

# COPY FROM THIS LINE, if your post-merge hook already contains content
# MIT © Sindre Sorhus - sindresorhus.com

# git `post-merge` hook to run a command after `git pull` if a specified file was changed
# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

gangadharjannu

End-to-end Testing with Shadow DOM

As the web component specs continue to be developed, there has been little information on how to test them. In particular the /deep/ combinator has been deprecated in Shadow DOM 1.0. This is particularly painful since most end-to-end testing frameworks rely on elements being discoverable by XPath or calls to querySelector. Elements in Shadow DOM are selectable by neither.

WebDriver.io

Webdriver.io has the standard actions by selectors, but also allows browser executable scripts to return an element

gangadharjannu

// USAGE:
//
// When you attach the infiniteScroll directive to an element, it will emit the infiniteScrollAction
// @Output() event every time the user has scrolled to the bottom of the element. Your loadMoreArticles
// function can make an HTTP call and append the results to the articles list, for example. In doing this,
// you effectively increase the height of the element and thus begin the process of the infiniteScroll directive 
// again, over and over until the element height stops increasing.
//
// <div class="container" infiniteScroll (infiniteScrollAction)="loadMoreArticles()">
//     <div class="article" *ngFor="let article of articles">

gangadharjannu

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

gangadharjannu

import {Injectable, EventEmitter} from 'angular2/core';

@Injectable()
export class EmitterService {
  private static _emitters: { [ID: string]: EventEmitter<any> } = {};

  static get(ID: string): EventEmitter<any> {
    if (!this._emitters[ID]) 
      this._emitters[ID] = new EventEmitter();
    return this._emitters[ID];