Vladimir Mikhaylovskiy vovanmix

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

install cloudflare_module

https://support.cloudflare.com/hc/en-us/articles/203656534-How-do-I-restore-original-visitor-IP-with-Apache-2-4-

mirght need to change sudo yum install httpd-devel libtool git with sudo yum install httpd24-devel libtool git

put the config file to /etc/httpd/conf.d/cloudflare.conf

CloudFlareRemoteIPHeader X-Forwarded-For

0-2 are necessary only if we need a user another that root to run commands for ansible

Create user to run ansible.

adduser test

passwd test

make it possible to run commands as root without a password

#Main idea Big files with code are very hard to maintain. I suggest to limit files size to 100 +- rows, splitting hard logic to smaller parts and moving them to separate files

#PHP Controllers should serve just as buffer between HTTP interface and the app. They should define Actions and call methods defined in Models, Repositories, Services etc. Processing logic related to handling one single record can be moved to Model. Processing logic related to handling a set of records of one type can be moved to Repository. Logic related to a specific subject can be moved to a separate Service. Common functionalities can be moved to parent abstract classes.

	<?php
	\DB::listen(function($sql, $bindings, $time) {
	var_dump( vsprintf(str_replace("?", "'%s'", $sql), $bindings) );

	});

	--- # Install mariadb via ansible on centOS
	- hosts: appserver
	user: test
	sudo: yes
	vars:
	mysql_root_password: passwd
	tasks:
	- name: Install MYSQL
	yum:
	name: mariadb-server #debian: mysql-server

	<?php

	$handle = fopen ("php://stdin","r");
	fscanf($handle,"%d",$t);
	for($a0 = 0; $a0 < $t; $a0++){
	fscanf($handle,"%d %d",$n,$k);
	$a_temp = fgets($handle);
	$a = explode(" ",$a_temp);
	array_walk($a,'intval');
	}

	## run $ a2enmod expires

	<IfModule mod_expires.c>

	ExpiresActive on
	ExpiresDefault "access plus 1 month"

	# CSS
	ExpiresByType text/css "access plus 1 year"

	brew install npm
	npm install phantom phantomjs -g