This slideshow presentation discuss about global objects , modules , functions , packages and introduction to gulp automation

1. Node JS
Module 2 – Packages Global vs Local

2. Global Packages vs Local Packages
 globally —- This drops modules in {prefix}/lib/node_modules, and puts
executable files in {prefix}/bin, where {prefix} is usually something like
/usr/local. It also installs man pages in {prefix}/share/man, if they’re
supplied.
 locally —- This installs your package in the current working directory. Node
modules go in ./node_modules, executables go in ./node_modules/.bin/, and
man pages aren’t installed at all.
 Whether to install a package globally or locally depends on the global config,
which is aliased to the -g command line switch.

3. Which to choose
The rule of thumb is:
 If you’re installing something that you want to use in your program, using
require('whatever'), then install it locally, at the root of your project.
 If you’re installing something that you want to use in your shell, on the
command line or something, install it globally, so that its binaries end up in
your PATH environment variable.
 There are some cases where you want to do both. Coffee-script and Express
both are good examples of apps that have a command line interface, as well
as a library.

4. Global Objects
 Global objects are available in all modules.
 Global objects need not to be included in application rather we can use them
directly.
 These could be Strings, objects, functions , modules also.
 Few Examples:
 Console
 Process

5. Global Strings
 Few Examples:
 __filename
 __dirname
 setTimeout(cb,ms)
 clearTimeout(t)
 setInterval(cb,ms)

6. Automating with Gulp
 What is gulp?
 Automation - gulp is a toolkit that helps you automate painful or time-consuming tasks in
your development workflow.
 Platform-agnostic - Integrations are built into all major IDEs and people are using gulp
with PHP, .NET, Node.js, Java, and other platforms.
 Simple - By providing only a minimal API surface, gulp is easy to learn and simple to use

7. Gulp methods
 Src: name of the file we work with
 Pipe: output of previous command as pipe it as input for the next
 Dest: writes the output to folder we specify

8. Example
Gulp.task(‘copy’,function(){
Gulp.src(‘index.html’)
.pipe(gulp.dest(‘assets’))
});