cmccormack

def calc(expr):
    operators = ['+', '-', '*', '/']
    stack = list()
    for item in expr.split(' '):
        if item in operators:
            right, left = [str(i) for i in (stack.pop(), stack.pop())]
            stack.append(eval(left + item + right))
        else:
            stack.append(eval(item + '+ 0'))

cmccormack

/** 
  * @desc this snippet will allow multiple arguments to a search query in Google Chrome
  * examples include https://www.reddit.com/r/%s/search?q=%s
  * @author Chris McCormack mccormack.christopher@gmail.com
  * @required Google Chrome.  Replace all values in brackets ([]) with valid entries.
  * To add to Chrome, go to Settings > Search [Manage search engines...] > Other search engines.
  *   At the bottom of this section, there are three required fields:
  *     [Add a new search engine] [Keyword] [URL with %s in place of query]
  *     - Add a new search engine: Descriptive name of your search
  *     - Keyword: used to trigger search.

cmccormack

<?php
if(!isset($_POST['submit']))
{
	//This page should not be accessed directly. Need to submit the form.
	echo "error; you need to submit the form!";
}
$name = $_POST['name'];
$visitor_email = $_POST['email'];
$message = $_POST['message'];

cmccormack

from threading import Thread, Lock
from random import randint
from time import sleep

class AsyncLetter(Thread):
    
    def __init__(self, letter):
        super().__init__()
        
        self.timer = randint(1,5)

cmccormack

// Example of a schema for a Poll document
const PollSchema = new mongoose.Schema({
  createdBy: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User'
  },
  createdTime: {
    type: String,
    required: true
  },

cmccormack

class AccurateInterval {

  intervalId = null

  constructor(fn, timer) {
    this.fn = fn
    this.timer = timer
  }

  start = () => {

cmccormack

# View device IP Address(es)
ip -o address show [interface] | awk '{print $4}' # Prints the IP address(es) of a single interface
ip address # Displays all interfaces
ifconfig # (deprecated)
hostname -I # Displays only IP addresses

# DNS name and resolution
host
dig
/etc/hosts # Add manual DNS record to hostname mappings (normally checked before configured DNS server(s))

cmccormack

Linux Boot Process

Bootloaders - Starts the OS:

• LILO - Linux Loader -
• GRUB - Grand Unified Bootloader
  • Replaced LILO

initrd - initial RAMDisk

• Temporary filesystem loaded into memory with helpers that can perform hardware detection and loads modules to get the filesystem mounted

cmccormack

tee

The tee utility copies standard input to standard output, making a copy in zero or more files. The output is unbuffered.

Example:

echo "I am the very model of a modern Major General" | tee general.txt
I am the very model of a modern Major General # Output
cat general.txt
I am the very model of a modern Major General # Output

cmccormack

{
  "url": "https://api.github.com/gists/53e1780a5a68fe9281cfbbc9820d381f",
  "forks_url": "https://api.github.com/gists/53e1780a5a68fe9281cfbbc9820d381f/forks",
  "commits_url": "https://api.github.com/gists/53e1780a5a68fe9281cfbbc9820d381f/commits",
  "id": "53e1780a5a68fe9281cfbbc9820d381f",
  "git_pull_url": "https://gist.github.com/53e1780a5a68fe9281cfbbc9820d381f.git",
  "git_push_url": "https://gist.github.com/53e1780a5a68fe9281cfbbc9820d381f.git",
  "html_url": "https://gist.github.com/53e1780a5a68fe9281cfbbc9820d381f",
  "files": {
    "forgeLikeServerSetup.md": {