Christophosaurus

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

#define PORT 8080
#define BUFFER_SIZE 1024

void respond(int client_socket) {

Christophosaurus

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

Christophosaurus

package main

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

func main() {

Christophosaurus

┌──────────────────────────────────────────────────────────────────────────────────────────────────────────┬──────────────────────────────────────────────────────────────────────────
│  printf Format Specifiers                                                                                │                                                                          
│  ┌──────────┬──────────────────────────────────────────────────┬───────────────────────────────────────┐ │/** printf format specifiers                                              
│  │ Specifier│Description                                       │ Example Output                        │ │ *    ███        ▄████████     ███        ▄████████ ███    █▄   ▄██████▄  
│  ├──────────┼──────────────────────────────────────────────────┼───────────────────────────────────────┤ │ *▀█████████▄   ███    ███ ▀█████████▄   ███    ███ ███    ███ ███    ███ 
│  │ %d       │Signed decimal integer                            │ printf("%d", 42); // 42               │ │ 

Christophosaurus

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

Christophosaurus

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

Christophosaurus

package main

import (
  "fmt"
  "reflect"
)

// Name of the struct tag used in examples
const tagName = "validate"

Christophosaurus

# Change these variables as necessary.
MAIN_PACKAGE_PATH := ./cmd/example
BINARY_NAME := example

# ==================================================================================== #
# HELPERS
# ==================================================================================== #

## help: print this help message
.PHONY: help

Christophosaurus

package main
import (
    "net"
    "os"
)

func main() {
    strEcho := "Halo"
    servAddr := "localhost:6666"
    tcpAddr, err := net.ResolveTCPAddr("tcp", servAddr)

Christophosaurus

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

• https://leetcode.com/problems/maximum-subarray/ # Close enough
• https://leetcode.com/problems/minimum-size-subarray-sum/