shintack

SELECT name FROM employees WHERE id NOT IN (SELECT managerId FROM employees WHERE managerId IS NOT NULL);

shintack

SELECT COUNT(*) FROM students WHERE firstName = "John";

shintack

<?php
class Pipeline
{
    public static function make_pipeline(...$funcs)
    {
        return function($arg) use ($funcs)
        {
            foreach ($funcs as $func)
            {
                $arg = $func($arg);

shintack

<?php
class Palindrome
{
    public static function isPalindrome($word)
    {
        $word = strtolower($word);
        return $word===strrev($word);
    }
}

shintack

rbenv install 2.4.0
rbenv global 2.4.0
ruby -v

shintack

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc
exec $SHELL

shintack

cd
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
exec $SHELL

shintack

sudo apt-get update
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev nodejs