document.documentElement.webkitRequestFullscreen();

loop:
for(let i=0; i<10; i++) {
  for(let j=0; j<10; j++){
    console.log(i,j);
    if(j === 5) break loop;
  }
}

const v8 = require('v8');

const structuredClone = obj => {
  return v8.deserialize(v8.serialize(obj));
};

sudo apt-get update

sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

sudo apt-get update

sudo apt-get install docker-ce docker-ce-cli containerd.io

# Using Ubuntu
curl -sL https://deb.nodesource.com/setup_11.x | sudo -E bash -
sudo apt-get install -y nodejs

'mysql' => [
            'driver' => 'mysql',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'charset' => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix' => '',
            'strict' => true,
            'engine' => null,
            'options' => [
                \PDO::ATTR_PERSISTENT => true
            ]
        ],

SELECT CONCAT(ROUND(KBS/POWER(1024, 
IF(PowerOf1024<0,0,IF(PowerOf1024>3,0,PowerOf1024)))+0.49999), 
SUBSTR(' KMG',IF(PowerOf1024<0,0, 
IF(PowerOf1024>3,0,PowerOf1024))+1,1)) recommended_innodb_buffer_pool_size 
FROM (SELECT SUM(data_length+index_length) KBS FROM information_schema.tables 
WHERE engine='InnoDB') A, 
(SELECT 2 PowerOf1024) B; 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple/DTD PLIST 1.0//EN"
          "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
      <string>limit.maxproc</string>
    <key>ProgramArguments</key>
      <array>
        <string>launchctl</string>
        <string>limit</string>
        <string>maxproc</string>
        <string>2048</string>
        <string>2048</string>
      </array>
    <key>RunAtLoad</key>
      <true />
    <key>ServiceIPC</key>
      <false />
  </dict>
</plist>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
          "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>limit.maxfiles</string>
    <key>ProgramArguments</key>
    <array>
      <string>launchctl</string>
      <string>limit</string>
      <string>maxfiles</string>
      <string>524288</string>
      <string>524288</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
    <key>ServiceIPC</key>
    <false/>
  </dict>
</plist>

sudo chown root:wheel /Library/LaunchDaemons/limit.maxfiles.plist
reboot
ulimit -n

To increase or decrease /dev/shm filesystem size

1) Open /etc/fstab with vi or any text editor of your choice,

2) Locate the line of /dev/shm and use the tmpfs size option to specify your expected size,

e.g. 512MB:
tmpfs      /dev/shm      tmpfs   defaults,size=512m   0   0

e.g. 2GB:
tmpfs      /dev/shm      tmpfs   defaults,size=2g   0   0

The /etc/fstab content format is documented in man fstab and the tmpfs filesystem options can be found in man mount

3) To make change effective immediately, run this mount command to remount the /dev/shm filesystem:
mount -o remount /dev/shm

ssh -f -N -L 9906:127.0.0.1:3306 user@database.example.com

Host tunnel
  HostName database.example.comm
  IdentityFile ~/.ssh/id_rsa
  LocalForward 9906 127.0.0.1:3306
  User root

$ ssh -f -N tunnel

hdiutil convert -format UDRW -o destination_file.img source_file.iso
diskutil list
diskutil partitionDisk /dev/disk2 1 "Free Space" "unused" "100%"
sudo dd if=destination_file.img.dmg of=/dev/disk2 bs=1m

pkg-static upgrade -f 

<?php
function getUuid()
    {
        // http://stackoverflow.com/questions/2040240/php-function-to-generate-v4-uuid
        // by Andrew Moore (http://www.php.net/manual/en/function.uniqid.php#94959)
        return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
            // 32 bits for "time_low"
            mt_rand(0, 0xffff), mt_rand(0, 0xffff),
            // 16 bits for "time_mid"
            mt_rand(0, 0xffff),
            // 16 bits for "time_hi_and_version",
            // four most significant bits holds version number 4
            mt_rand(0, 0x0fff) | 0x4000,
            // 16 bits, 8 bits for "clk_seq_hi_res",
            // 8 bits for "clk_seq_low",
            // two most significant bits holds zero and one for variant DCE1.1
            mt_rand(0, 0x3fff) | 0x8000,
            // 48 bits for "node"
            mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
        );
    }

ALTER USER 'script'@'localhost' PASSWORD EXPIRE NEVER

brew reinstall --build-from-source php70-intl

sudo mdutil -i on 
sudo rm -rf /.Spotlight-V100

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';

git push --mirror