Prasanna worldofprasanna

Nerd Tree

To show hidden files - I
To toggle NerdTree - Ctrl + n

Vim Surround

To surround a word with " - ysiw" (instead of iw - other text objects can be used like ip, iW )
To change " to ' - cs"'

Zoom Vim

To toggle zoom in a pane - Ctrl + w, o

Useful commands in vim-orgmode

Headers

      1. *, **, etc for creating headings, sub headings
      2. To continue headers, press <enter> in normal mode
      3. >>, << to convert sub headers to headers or vice versa
      4. <Tab> and <S-Tab> to fold headers
      5. zm, zr to close the whole list

	def array_to_hash(arr)
	hash_val = Hash.new
	arr.uniq.each {\|n\| hash_val[n] = arr.grep(n)}
	hash_val
	end

	# array_to_hash([1,2,3,2,1]) => {1=>[1, 1], 2=>[2, 2], 3=>[3]}

	function printName(isFirstName){
	console.log(firstName); // Variables hoisted to the top
	console.log(lastName);

	if (isFirstName){
	var firstName = 'Prasanna';
	}else {
	var lastName = 'V'
	}
	}

	class Person {
	constructor(name){
	this.name = name;
	}
	}
	class Employee extends Person {

	constructor(id, name){
	super(name);
	this.id = id;

	# Java style of file handling
	# Good example of sandwich code

	filename='test.txt'
	try:
	file = open(filename)
	print(file.readlines())
	except Exception as e:
	print(e.args[0])
	finally:

	class Proxy:
	def __init__(self, target_object):
	object.__setattr__(self, 'msg', OrderedDict())
	object.__setattr__(self, '_obj', target_object)

	def __getattr__(self, name):
	if name in self.msg:
	self.msg[name] += 1
	else:
	self.msg[name] = 1

	# pull & start the container
	docker run busybox

	# list all the images
	docker images

	# to remove all the images
	docker rmi $(docker images -q)

	# to remove the exited containers

	Reference: https://prakhar.me/docker-curriculum/#busybox

	# Run a static website in background. d - detach mode, P - expose all ports, --name give name to the running container
	docker run -d -P --name static-site prakhar1989/static-site

	# To see the ports used
	docker port static-site

	# Docker networks

	# to find a pid by port
	lsof -n -i:$PORT \| grep LISTEN