Precious Kyu

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

What, Why, Consequences of not doing it, How to do it right

Required Java conventions

What: Lowercase package naming.
Why: Some file systems (windows) consider iTeMs and items to be the same, but every other system considers them to be different.
Consequences: Not doing this may never cause any issues (and very likely won't in your dev environment), but on other operating systems with different case-sensitivities from yours this can cause massive problems.
How: Name your packages all in lowercase.

What: Packaging that reflects your web presence.
Why: Avoid name collisions - your web presence is unique so it is commonly used.
Consequences: Errors loading classes with other mods installed, usually happens when 2 mods never changed their packaging from the default in the MDK.

SSH keypair setup for GitHub (or GitHub/GitLab/BitBucket, etc, etc)

Create a repo.

Make sure there is at least one file in it (even just the README.md)

Generate a SSH key pair (private/public):

ssh-keygen -t rsa -C "[email protected]"

	import smtplib

	#email.mime.multipart is specific to python3
	from email.mime.multipart import MIMEMultipart
	from email.mime.text import MIMEText

	msg = MIMEMultipart()
	msg['From'] = '[email protected]'
	msg['To'] = '[email protected]'
	msg['Subject'] = 'Subject'

	// Copyright 2019 The MediaPipe Authors.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,

	#!/bin/sh
	# Tested on macOS 12.0 / Xcode 13.3 / Homebrew 3.4.6-60-ge1c1157

	# yum install python python-devel
	# echo '[group_kdesig-cmake3_EPEL]
	# name=Copr repo for cmake3_EPEL owned by @kdesig
	# baseurl=https://copr-be.cloud.fedoraproject.org/results/@kdesig/cmake3_EPEL/epel-7-$basearch/
	# type=rpm-md
	# skip_if_unavailable=True
	# gpgcheck=1

	import os
	import logging.config
	import structlog
	from .app import app


	timestamper = structlog.processors.TimeStamper(fmt="iso")
	pre_chain = [
	# Add the log level and a timestamp to the event_dict if the log entry is not from structlog.
	structlog.stdlib.add_log_level,

	import Cocoa
	import Foundation

	// Move around and click automatically at random places in macos, kinda human like in a cheap way.


	// Moves the mouse pointer to `moves` random locations on the screen and runs the `action` function at
	// each point with the point as argument.
	func mouseMoveWithAction(moves: Int, action: (CGPoint) -> Void = defaultAction) {
	let screenSize = NSScreen.main?.visibleFrame.size

	#!/bin/sh

	# Based on BMitch's answer from:
	# https://stackoverflow.com/questions/38946683/how-to-test-dockerignore-file

	# Note: will create and delete temporary file "Dockerfile.build-context"

	# 1. Copy to project folder where image is being built
	# 2. Run script
	# 3. You should see list of files in build context

	# Useful references:
	#
	# https://superuser.com/questions/992511/emulate-a-keyboard-button-via-the-command-line
	# https://ss64.com/vb/sendkeys.html
	# https://social.technet.microsoft.com/Forums/windowsserver/en-US/96b339e2-e9da-4802-a66d-be619aeb21ac/execute-function-one-time-in-every-10-mins-in-windows-powershell?forum=winserverpowershell
	# https://learn-powershell.net/2013/02/08/powershell-and-events-object-events/
	#
	# Future enhancements - use events rather than an infinite loop
	$wsh = New-Object -ComObject WScript.Shell
	while (1) {