Kapil Lamba kapillamba4

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

So, what is crosswalk and why do I care? Take a look at the website: https://crosswalk-project.org/

CrossWalk is a HTML5 runtime, you can use it to create HTML5 applications with 'native features' You can use CrossWalk to create HTML5-only applications for Android (x86 and arm architectures) and Tizen but you can also use CrossWalk as a View within an android project.

This means you can replace Android WebView with XWalkView and get some extra features like:

MySQL

Getting started

Related tutorials

####Some tips'n tricks to build Android Eclipse projects using Gradle. http://tools.android.com/tech-docs/new-build-system/user-guide

http://www.alonsoruibal.com/my-gradle-tips-and-tricks/

http://www.vogella.com/tutorials/AndroidBuild/article.html

Why?

Using Gradle builds has many advantages. In our case we can change the package name of the app and get two builds of the same app with different configurations.

Steps to make a Fragment or View to have a Callback to its parent Activity.

Step by step from info taken from here:

http://developer.android.com/guide/components/fragments.html#CommunicatingWithActivity

We have an Activity that hosts a Fragment or a View
We have a Fragment or View with a ListView or a Button or some element that we want the Activity to know about. i.e. we load detailed info of an element chosen on a ListView or something.

	/*
	Assuming jQuery Ajax instead of vanilla XHR
	*/

	//Get Github Authorization Token with proper scope, print to console
	$.ajax({
	url: 'https://api.github.com/authorizations',
	type: 'POST',
	beforeSend: function(xhr) {
	xhr.setRequestHeader("Authorization", "Basic " + btoa("USERNAME:PASSWORD"));

	update(ft, p, v):
	for (; p <= N; p += p&(-p))
	ft[p] += v

	# Add v to A[a...b]
	update(a, b, v):
	update(B1, a, v)
	update(B1, b + 1, -v)
	update(B2, a, v * (a-1))
	update(B2, b + 1, -v * b)

	/*
	* Note: This template uses some c++11 functions , so you have to compile it with c++11 flag.
	* Example:- $ g++ -std=c++11 c++Template.cpp
	*
	* Author : Akshay Pratap Singh
	* Handle: code_crack_01
	*
	*/

	/****** All Required Header Files ******/

	package se.marteinn.ui;

	import android.content.Context;
	import android.util.AttributeSet;
	import android.view.View;
	import android.widget.ScrollView;


	/**
	* Triggers a event when scrolling reaches bottom.

	#!/bin/bash
	# Sometimes you need to move your existing git repository
	# to a new remote repository (/new remote origin).
	# Here are a simple and quick steps that does exactly this.
	#
	# Let's assume we call "old repo" the repository you wish
	# to move, and "new repo" the one you wish to move to.
	#
	### Step 1. Make sure you have a local copy of all "old repo"
	### branches and tags.