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# When you have __init__.py (blank one), you can import the module using
from dirname import MyModule

# But when you dont have _init_.py at all, you cannot import the module without adding the path till that module to PYTHONPATH.
# In this case from dirname import MyModule FAILS, or reports error.

# If a directory (folder) contains a __init__.py file then it becomes a package.
# What you thought you read was not strictly correct, as you found.
# A package can be imported as if it was a module by itself, and any code in __init__.py is run, although it is often empty.
# Packages are a way of grouping multiple modules together, and you can load them using:

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$ apt-get remove python-pip
$ easy_install pip

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# SEARCH TABLE NAME:
SHOW TABLES FROM master LIKE '%table_name%';

# CHECK MYSQL CONF:
cat /etc/my.cnf

# BACKUP SINGLE DATABASE:
mysqldump -u username -p database_to_backup > backup_name.sql

# RESTORE SINGLE DATABASE:

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# AVOID SUDO PASSWORD:
# sudo: no tty present and no askpass program specified
$ sudo visudo
$ my_slave_user  ALL=(ALL) NOPASSWD: ALL

# FORMATING A PENDRIVE:
# To show all the volume in your pc
sudo fdisk -l

# To see the usb flash drive suppose it may be /deb/sdb1

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//Add gradle to existing java project:

//Step 1:
build.gradle

//Step 2:
apply plugin: 'idea'
apply plugin: 'java'

//Step 3:

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$(".txtClass")                  =>  getElementsByClassName()
$("#childDiv2 .txtClass")       =>  getElementById(), then getElementsByClassName()
$("#childDiv2 > .txtClass")     =>  getElementById(), then iterate over children and check class
$("input.txtClass")             =>  getElementsByTagName(), then iterate over results and check class
$("#childDiv2 input.txtClass")  =>  getElementById(), then getElementsByTagName(), then iterate over results and check class

//Example:

$('.txtClass');
$('#childDiv2 .txtClass')

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###
$ sudo npm install -g coffee-script
###

# COMPARING TERNARY CODE:
  @getInstance: ->
      Instante ?= new DeviceManager()
  
  DeviceManagerSingleton.getInstance = function() {
      return Instante != null ? Instante : Instante = new DeviceManager();

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//******************************************************************
// Steps to set nodejs, expressjs and grunt:
// 1. Install nodejs
//    $ sudo npm install nodejs
// 2. Install expressjs//# 3. Install grunt-cli
// 5. Create a project using express (building a skeleton directory)
// 6. Install grunt
// 7. Create Package folder
// 8. Run grunt command
// 9. Create basic create and clean tasks

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// Count an array that is embedded into document.

// Document:
{name: 'Pepito', tags: ['A', 'B', 'C', 'D']}

//Mongodb query:
db.employees.aggregate(
  {$match: {name : "Pepito"}}, 
  {$unwind: "$tags"},
  {$group: {_id: null, number: {$sum: 1 }}}

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# CHECKOUT BRANCH
   $ checkout branch -f
   $ git pull

# CHECK CHANED FILES IN GIT COMMIT:
   $ git log
   $ git log -p -2
   $ git log --pretty=oneline
   $ git log --name-only
   $ git log -1 --stat