ntamvl

First, install latest Ruby Example:

rbenv install 2.6.0
rbenv global 2.6.0
rbenv rehash

After that I redid the following:

ntamvl

constructor(props) {
    super(props);
    this.state = {
        height: window.innerHeight,
        message: 'not at bottom'
    };
    this.handleScroll = this.handleScroll.bind(this);
}

ntamvl

PostgreSQL: Show size of all databases

SELECT pg_database.datname as "database_name", pg_database_size(pg_database.datname)/1024/1024 AS size_in_mb FROM pg_database ORDER by size_in_mb DESC;

SELECT
    pg_database.datname,
    pg_size_pretty(pg_database_size(pg_database.datname)) AS size

ntamvl

# an initializer
# gem install bunny
# written by: Tam Nguyen (twitter: @nguyentamvn)

require 'bunny'
require 'json'

class RabbitPublisher
  def initialize(options = {})
    bunny_config = {

ntamvl

How to install gem idn-ruby

Ubuntu*

$ sudo apt -y install libidn11-dev
$ gem install idn-ruby  # Rails で使用する場合はプロジェクトディレクトリ内で bundle install

macOS

ntamvl

Fixed the fan running high, kernel task taking up 500% cpu (high cpu)

Step 1: Disable SIP

Enter recovery mode

• Shutdown your macbook
• Press keys: Command + R
• Press power button
• Release keys Command + R when see Apple logo appear
• Open Terminal app on recovery screen, then run below command:

ntamvl

Rails SQL Injection with LIKE

SQL ‘LIKE’ injection is a form of denial-of-service attack where an end-user adds wildcards to a SQL query that uses the ‘LIKE’ keyword. This greatly increases the time it takes to run the query. If your Rails application allows user searching using email:

users = User.includes(:profile).where("profiles.email LIKE ?", "#{term}%“).all

A user can include percent signs in their search and vastly increase the query duration, slowing down the database.

What are the risks?

ntamvl

How to change Wordpress permalink structure

Add Nginx to your generator (or at least to the article).

With my case, I want to change old permalink to new permalink, example in this case:

Old permalink: http://www.dorachan.xyz/2018/06/10/phat-tam-nguong-mo-nha-giao-duc-vi-dai-maria-montessori/

New permalink: http://www.dorachan.xyz/phat-tam-nguong-mo-nha-giao-duc-vi-dai-maria-montessori/

ntamvl

SOCKS 5 proxy tunnel

Open a terminal program on your computer. On Mac OS X, this is Terminal in Applications > Utilities.

Set up the tunnel with this command:

ssh -D 8123 -f -C -q -N ubuntu@example.com

Explanation of arguments

ntamvl

Run react-native application on iOS device directly from command line

The following worked for me (tested on react native 0.38 and 0.40):

npm install -g ios-deploy
# Run on a connected device, e.g. Max's iPhone:
react-native run-ios --device "Max's iPhone"

This is the proper way to do this according to fb. If you try to run just the run-ios command, you will find that the script recommends that you npm install -g ios-deploy when it comes to the install step after building.