Arjun Mayilvaganan arjunmayilvaganan

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Strings

`String.prototype.*`

None of the string methods modify this – they always return fresh strings.

charAt(pos: number): string ^ES1

Returns the character at index pos, as a string (JavaScript does not have a datatype for characters). str[i] is equivalent to str.charAt(i) and more concise (caveat: may not work on old engines).

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

	func TestRedis(t *testing.T) {
	s, _ := testutil.PrepareTestRedis()
	for i := 0; i < 10000; i++ {
	s.Set("key"+strconv.Itoa(i), "hoge"+strconv.Itoa(i))
	}
	client := redis.NewClient(&redis.Options{Addr: s.Addr()})

	// 普通にループ
	result := map[string]string{}
	for i := 0; i < 10000; i++ {

	package main

	import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
	)

	func main() {

	var Backbone = require('backbone');

	// Flash ///////////////////////////////////////////////////////////////////////////////////////////

	// The flash is a way for one controller to pass a small amount of information to the next
	// controller, through a navigation event.
	//
	// The flash holds arbitrary parameters, and is cleared by the router after each navigation event.
	var flash = exports.flash = {
	params: {},

	# Compiled source #
	###################
	*.com
	*.class
	*.dll
	*.exe
	*.o
	*.so

	# Packages #

	// # Mocha Guide to Testing
	// Objective is to explain describe(), it(), and before()/etc hooks

	// 1. `describe()` is merely for grouping, which you can nest as deep
	// 2. `it()` is a test case
	// 3. `before()`, `beforeEach()`, `after()`, `afterEach()` are hooks to run
	// before/after first/each it() or describe().
	//
	// Which means, `before()` is run before first it()/describe()