Ramaraj T jsramraj

Basic concepts for OOPS Object-Oriented Programming vs Structural Programming and examples What is class & object Encapsulation - access modifiers Polymorphism Inheritance - types of Inheritance constructor - return type? Descructor inline function overloading - function vs operator

Regular Expression Tutorial

This tutorial is meant to be a foundational reference guide for anyone learning Regular Espressions. By the end of this tutorial you will know what a regular expression is, when to use them, all of their different functionality, as well as some cool tips on how to improve your own regex scripting. Throughout this tutorial we'll be referencing a specific regular expression, breaking down each component and learning about the functionality of each part.

Bonus: You can click here to navitage to an online regex editor so you can practice your regex scripting as you learn!

Summary

Regular expression for email: /^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/

Push subtree

git push origin git subtree split --prefix dist main:gh-pages --force

Change git author name and email

git filter-branch -f --env-filter " GIT_AUTHOR_NAME='jsramraj' GIT_AUTHOR_EMAIL='[email protected]' GIT_COMMITTER_NAME='Ramaraj T' GIT_COMMITTER_EMAIL='[email protected]' " HEAD

List all the tags git tag -l

Delete a tag from the remote git push -d origin 1.0

Delete a tag locally git tag -d 1.0

Process Id by app name

adb shell ps | grep appName adb shell pidof com.myCompany.myApp

Logcat by packagename

adb logcat --pid=14029

Tell the adb daemon to use TCP rather than USB

Quite often you may need to clear the obj and bin folders in the Mac when you work on a xamarin project.

The following command will do that for you.

It will search for all the folders named obj and bin and delete them.

find . -type d $ -name "obj" -o -name "bin" $ -exec rm -rf {} \;

	** iOS Devices

	armv6, armv7, armv7s: A 32-bit architecture that appeared on early iPhone and iPad devices. Supported up to iPhone 5 the march of time made them obsolete.

	arm64: A 64-bit architecture used in iPhone 5s - iPhone 7 devices.

	arm64e: The new dominant 64-bit iOS architecture used in Phone 8 - later devices.

	** Simulator:

	1. Find the most occurred number in the given array
	Input - [3,4,3,2,3,3,4,5,6,5,5,4,3,3,3,3,3,3]
	Output = 3


	2. Find the last word count in the given sentence
	Input - I Love India
	Output - 5

	private string ExtractSqlCommandFromCommand(SQLiteCommand cmd)
	{
	string sql = cmd.CommandText;
	bool first = true;
	foreach (SQLiteParameter p in cmd.Parameters)
	{
	string value = ((p.Value == DBNull.Value) ? "null"
	: (p.Value is string) ? "'" + p.Value + "'"
	: (p.Value is DateTime) ? "'" + ((DateTime)p.Value).ToString("yyyy-MM-dd HH:mm:ss") + "'"
	: p.Value.ToString());