Abhinav Anand abnvanand

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window

# Sample Inventory File

# Web Servers
web1 ansible_host=server1.company.com ansible_connection=ssh ansible_user=root ansible_ssh_pass=Password123!
web2 ansible_host=server2.company.com ansible_connection=ssh ansible_user=root ansible_ssh_pass=Password123!
web3 ansible_host=server3.company.com ansible_connection=ssh ansible_user=root ansible_ssh_pass=Password123!

# Database Servers
db1 ansible_host=server4.company.com ansible_connection=winrm ansible_user=administrator ansible_password=Password123!

man pages

go help test
go help testflag

Naming Conventions

Add _test to filenames.
Prefix test functions with Test
Accept one param *testing.T
Same package name for whitebox testing
Add _test suffix to package name for blackbox testing

Docker

List images: docker images

Get image: docker pull ubuntu

Image to container: docker run -ti image-name proc-to-run -ti => terminal interactive

>> docker run -ti ubuntu:latest bash
root@91a4f28e6693:/#

Raspberry Pi find ip

TLDR; Continue if all you have are the following

raspberrypi
raspbian image
linux(ubuntu)
ethernet cable (LAN cable)
Internet (for installing required packages)

A sequence of collective communications on distinct procs will be matched in the order in which they are executed.

for eg here proc one receives value of x in y and y in x.

#include <bits/stdc++.h>
#include <mpi.h>

using namespace std;

enable usb debugging: https://www.fonearena.com/blog/275578/how-to-uninstall-apps-on-xiaomi-without-root.html

sudo apt install android-tools-adb adb devices adb shell pm uninstall -k --user 0 com.android.calendar

	import "fmt"

	// Compile-time checks for ensuring a type implements a particular
	// interface.
	var (
	// Works but allocates a dummy Foo instance on the heap.
	_ fmt.Stringer = &Foo{}

	// Preferred way that does not allocate anything on the heap.
	_ fmt.Stringer = (*Foo)(nil)

	concurrent = 1
	check_interval = 0

	[session_server]
	session_timeout = 1800

	[[runners]]
	name = "my-runner"
	url = ""
	token = ""

	local hostname="%{$fg_bold[black]%}%m"
	local ret_status="%(?:%{$fg_bold[green]%}➜ :%{$fg_bold[red]%}➜ %s)"

	if [[ -n $SSH_CONNECTION ]]; then
	PROMPT='${hostname} ${ret_status}%{$fg_bold[green]%}%p %{$fg[cyan]%}%c %{$fg_bold[blue]%}$(git_prompt_info)%{$fg_bold[blue]%} % %{$reset_color%}'
	else
	PROMPT="%(?:%{$fg_bold[green]%}➜ :%{$fg_bold[red]%}➜ )"
	PROMPT+=' %{$fg[cyan]%}%c%{$reset_color%} $(git_prompt_info)'
	fi