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Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

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cat temp.txt | ruby -nae 'BEGIN { x = 0 }; puts "#{ x += $F[0].to_f }"'

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tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

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git shortlog -s -n --after "48 hours ago"

raypereda

package main

import (
    "net/http"
    "fmt"
)

func main() {
    http.Handle("/string", String("I'm a frayed knot."))
    http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})

raypereda

package main

import (
	"fmt"
)

type ErrNegativeSqrt float64

func (e ErrNegativeSqrt) Error() string {
	return fmt.Sprintf("cannot Sqrt negative number: %g ", float64(e))

raypereda

package main

import "fmt"

func Cbrt(x complex128) complex128 {
    z := x
    for i := 0; i < 10; i++ {
        z = z - (z*z*z - x)/ (3*z*z)
    }
    return z

raypereda

package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func(int) int {
    return func(n int) int {
        a, b := 0, 1
        for i := 0; i < n; i++ {

raypereda

package main

import "code.google.com/p/go-tour/pic"

func Pic(dx, dy int) [][]uint8 {
    pic := make([][]uint8, dy)
    for i, _ := range pic {
        pic[i] = make([]uint8, dx)
        for j := 0; j < dy; j++ {
        	pic[i][j] = uint8(i*j)

raypereda

package main

import (
    "code.google.com/p/go-tour/wc"
    "strings"
    "fmt"
)

func WordCount(s string) map[string]int {
    words := strings.Fields(s)