motaher13

1. resource: https://gist.github.com/Jonalogy/54091c98946cfe4f8cdab2bea79430f9
2. register your ssh key to all git accounts
3. Edit ~./ssh/config file

    #personal
    Host github.com
      Hostname ssh.github.com
      Port 443

    #git shipday

motaher13

private boolean isValidWebhook(String secret, String body, String timestamp, String headerSignature) {
      String computedSignature = getSignature(secret, body, timestamp);
      return headerSignature.equals(computedSignature);
  }


  String getSignature(String secret, String body, String timestamp) {
      SecretKeySpec signingKey = new SecretKeySpec(secret.getBytes(), HMAC);
      try {
          String signature = body + timestamp;

motaher13

GROKKING NOTES

The following problems are equvalent of Grokking the coding interview course, and solutions are also attached

Pattern: Sliding Window

• Maximum Subarray # Close enough -> Solution
• Minimum Size Subarray Sum -> Solution
• Longest Substring with At Most K Distinct Characters -> Solution
• Fruit Into Baskets -> [Solution](https://github.com/motaher13/Solved-OJ-problems/blob/master/LeetCode/Array/Fruit

motaher13

AWS keywords

EC2: elastic compute cloud

EBS: elastic block store, just some storage

VPC: virtual private cloud, private network among instances

SPOT: unrented EC2 instances available for ren in cheap with bidding, will be occupied till the bid is better than market demand

motaher13

Kotlin

source: https://www.youtube.com/watch?v=F9UC9DY-vIU

Variables

* 2 types 
1. immutable -> val
2. mutable -> var

motaher13

db=db.getSiblingDB("school");
db.person.drop();
var characters       = ['a','b','c','d','e','f','g','h','i'];
var charactersLength = 9;

function getRandomInt(n) {
  return Math.floor(Math.random() * n);

motaher13

CREATE TABLE vbSMSContactTest (
  cntContactNo varchar(50) NOT NULL,
  cntSMSCountryID decimal(18,0) NOT NULL,
  cntCountryCode varchar(10) NOT NULL,
  cntOperatorCode varchar(10) NOT NULL,
  cntSource varchar(100) DEFAULT NULL,
  cntStatus tinyint(4) DEFAULT NULL,
  cntCreationDate bigint(20) NOT NULL
);

motaher13

The Linux Experiment
85.8K subscribers
https://www.youtube.com/watch?v=ArBCfhVsTZw

I recently set up my new Matebook 13 with some nice touchpad gestures on elementary OS, and it works great. Since I like to share, here is how to enable said gestures, and create them on the fly on your own system. These commands will work on Ubuntu, or anything based on Ubuntu, but you can adapt them for your own distro if needed.

Support the channel on Patreon: https://www.patreon.com/thelinuxexper...

Follow me on Twitter : http://twitter.com/thelinuxEXP

motaher13

# instal lampp

--apache
sudo apt update
sudo apt install apache2
sudo ufw app list
sudo ufw allow in "Apache Full"

motaher13

#!/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.
#

### OPTION 1 ###########################################################################################
# Let's assume we call "old repo" the repository you wish
# to move, and "new repo" the one you wish to move to.
#