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Sync observables created from a synchronous source will emit values synchronously, so the observers will receive values in the order of subscription.

The source iterable is traversed for each observer subscribed. For example, the size of source iterable is M, there are N observers, so the traversal times is M*N. This is explained in RxJS5 Manual:

Plain Observables are unicast (each subscribed Observer owns an independent execution of the Observable)

let sub = Rx.Observable.range(0, 3);

sub.subscribe(value => console.log(`observer 1: ${value}`));
sub.subscribe(value => console.log(`observer 2: ${value}`));

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chrome.action.onClicked.addListener((tab) => {
  chrome.scripting.executeScript({
    target: {
      tabId: tab.id,
    },
    files: ["content.js"],
  });
});

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Install tmux

brew install tmux

Start tmux (https://gitlab.com/gnachman/iterm2/wikis/TmuxIntegration)

Run tmux -CC or tmux -CC attach in iTerm2 and then menu is shown on terminal:

• ESC to detach
• C to run commands
• X to force quit
• L for log

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// Copy and save the script as a predefined snippet in Chrome Devtools
// Run it to proceed to an insecured website if blocked by Chrome
// See how to use snippets: https://developers.google.com/web/tools/chrome-devtools/javascript/snippets
(function() {
  const link = document.querySelector('#proceed-link');
  if (link && link.tagName.toLowerCase() === 'a') {
    link.click();
  } else if (
    typeof sendCommand === "function" &&
    SecurityInterstitialCommandId &&

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#! /bin/bash
CWD=`pwd`

printUsage() {
    echo "gitr - Git for multiple repositories made easy!"
    echo -e "Usage: gitr <branch|status|push|pull|fetch|merge|stash|checkout [options] [arguments]> [--repos <repo>...] [--gitr-base <path>]"
}

println() {
    echo "$1"

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With angular-cli, it helps create an angular2 app quickly. All required tools are provisioned in a simple command ng new, including Protractor - the end-to-end testing tool for angular.

To perform the testing, run ng e2e. It will first run webdriver-manager update to download & install webdrivers, see pree2e script in package.json. However, the below error may be encountered if you are in a corporate network:

[15:10:59] E/downloader - { Error: unable to get local issuer certificate
    at Error (native)
    at TLSSocket.<anonymous> (_tls_wrap.js:1060:38)
    at emitNone (events.js:86:13)
 at TLSSocket.emit (events.js:185:7)

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package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	a, b := 0, 1
	return func() int {
		i := a

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/*
 * Copyright 2002-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

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// inspired when reading https://leanpub.com/understandinges6/read#leanpub-auto-define-tags
// this is the behavior that template tags may interweave literals and subsitutions arrays
var interweave = (a, b) => {
  let min = Math.min(a.length, b.length);
  return Array.apply(null, Array(min)).reduce((result, value, index) => {
    result.push(a[index], b[index]);
    return result;
  }, []).concat((a.length > min ? a : b).slice(min));
};

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#!/bin/sh

USERNAME=user_name
HOST=vpn.example.com

vpn=/opt/cisco/anyconnect/bin/vpn

case "$1" in
    connect )
        shift