... jonjack

The following scenario has multiple Optionals, a real example could be where you are calling multiple validation checks where each check returns an Optional<T>. You then want to check if each Optional contains a value or is empty - returning the first one that has a value. If none contain a value (ie. are instances of Optional.empty) then you return a default value.

In this example we are using Optional<Single> where Single is an RxJava Observer that returns a single value.

import com.google.common.collect.ImmutableList;

Set your global user details.

git config --global user.name "Your Name"
git config --global user.email [email protected]

Set your line feed settings.

Metrics last collected 28.09.2018

Library	GitHub stars	Contract jobs (last 6 months) Source: itjobswatch.co.uk	Description
Play	10737	290	Fullstack web framework.
Akka	9054	222	For highly concurrent, distributed, and resilient message-driven applications on the JVM.
Scalatra	2321	2	Microframework port of Ruby’s Sinatra
Lift	1170

Some ideas I gathered from various places for working with Futures in for comprehensions.

Import what we need for all the examples.

import scala.concurrent.{Await, Future}
import scala.concurrent.duration._
import scala.concurrent.ExecutionContext.Implicits.global

scala.collection.Searching provides binary search but you need an Indexed sequence (eg. Array), not a Linear sequence (eg. List). Search will still work on the List but you get linear O(n) behaviour rather than O(Log n).

case class Employee (id: Int, name: String, age: Int)

val emp1 = Employee(1, "Jane Doe", 45)
val emp2 = Employee(2, "Jon Doe", 54)
val emp3 = Employee(3, "Tera Patrick", 38)
val emp4 = Employee(4, "Jenna Jameson", 36)
val emp5 = Employee(5, "Aurora Snow", 34) // not added

Using an Access Token for the first time

Follow the instructions on Github to Create an Access Token in Github

Configure Git to use the osxkeychain

By default, git credentials are not cached so you need to tell Git if you want to avoid having to provide them each time Github requires you to authenticate. On Mac, Git comes with an “osxkeychain” mode, which caches credentials in the secure keychain that’s attached to your system account.

You can tell Git you want to store credentials in the osxkeychain by running the following:-

Assumes High Sierra+

CMD + SHIFT + .      - shows all files/folders in Finder a window

Check whats available

brew search maven

==> Formulae
maven                maven-completion     maven-shell          [email protected]            [email protected]            [email protected]            [email protected]

	# ---------------------------------------------------------------------------
	#
	# Description: This file holds all my BASH configurations and aliases
	#
	# Sections:
	# 1. Environment Configuration
	# 2. Make Terminal Better (remapping defaults and adding functionality)
	# 3. File and Folder Management
	# 4. Searching
	# 5. Process Management

	#!/bin/sh

	function abspath() {
	pushd . > /dev/null;
	if [ -d "$1" ]; then cd "$1"; dirs -l +0;
	else cd "`dirname \"$1\"`"; cur_dir=`dirs -l +0`;
	if [ "$cur_dir" == "/" ]; then echo "$cur_dir`basename \"$1\"`";
	else echo "$cur_dir/`basename \"$1\"`"; fi; fi; popd > /dev/null;
	}