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Working on something great

Gregg Christofferson gchristofferson

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Working on something great
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  • Windsor California
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@gchristofferson
gchristofferson / whodunit.c
Created October 22, 2018 22:05
C program for course work that reads a bitmap file and then writes copy of the bitmap file while altering the red pixels to reveal a hidden message.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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gchristofferson / helpers.c
Created October 22, 2018 22:01
Course work helper functions for a music program that produced a music file from a separate file that contained the notes of the song.
// Helper functions for music
#include <cs50.h>
#include <math.h>
#include <stdio.h>
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gchristofferson / crack.c
Created October 22, 2018 21:57
This program takes a password hash from command line, then generates every possible 5 letter password combination using upper and lowercase letters, then uses crypt() to hash the generated word, and finally compares the hash to the user hash input from command line. If they match, password has been cracked.
/*-- This program takes a password hash from command line, then generates
every possible 5 letter password combination using upper and lowercase
letters, then uses crypt() to hash the generated word, and finally compares the hash
to the user hash input from command line. If they match, password has been cracked --*/
#define _XOPEN_SOURCE
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gchristofferson / caesar.c
Last active October 22, 2018 21:56
C program "caesar's cipher" for course work
// This program encrypts a message using Caesar's cipher
#include <stdio.h>
#include <cs50.h>
#include <string.h>
#include <ctype.h>
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gchristofferson / credit.c
Created October 22, 2018 21:42
C program from course work that validates a credit card number
#include <stdio.h>
#include <cs50.h>
#include <string.h>
int main(void)
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gchristofferson / mario.c
Created October 22, 2018 21:41
C program from course work that takes number of rows as input and prints a pyramid with that number of rows.
#include <stdio.h>
#include <cs50.h>
int main(void)
{
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gchristofferson / gist:52152917b5b279958838b958a081adf5
Created July 16, 2018 18:27 — forked from peterherrmann/gist:2700284
GASRetry - Exponential backoff JavaScript implementation for Google Apps Script (Library project key: "MGJu3PS2ZYnANtJ9kyn2vnlLDhaBgl_dE")
/**
* Invokes a function, performing up to 5 retries with exponential backoff.
* Retries with delays of approximately 1, 2, 4, 8 then 16 seconds for a total of
* about 32 seconds before it gives up and rethrows the last error.
* See: https://developers.google.com/google-apps/documents-list/#implementing_exponential_backoff
* <br>Author: [email protected] (Peter Herrmann)
<h3>Examples:</h3>
<pre>//Calls an anonymous function that concatenates a greeting with the current Apps user's email
var example1 = GASRetry.call(function(){return "Hello, " + Session.getActiveUser().getEmail();});
</pre><pre>//Calls an existing function
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gchristofferson / ceasars-cipher
Last active April 12, 2018 06:47
//I have to charCodeAt str i indexOf then add 13. then string from charCode using new number?
function rot13(str) { // LBH QVQ VG!
var array = str.split(" ");
var key = ["A","B","C","D","E","F",
"G","H","I","J","K","L",
"M","N","O","P","Q","R",
"S","T","U","V","W","X",
"Y","Z"];
var key1 = {
"A": [0],
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gchristofferson / minify-liquid.html
Created December 26, 2017 20:43 — forked from sskylar/minify-liquid.html
Simple HTML minify with Liquid/Siteleaf. Strips all line breaks, tabs, and extra spaces.
{% capture html %}
<html>
...
</html>
{% endcapture %}{{ html | strip_newlines | replace:' ','' | replace:' ','' | replace:' ',' ' }}
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gchristofferson / exportjson.js
Created December 13, 2017 07:25 — forked from pamelafox/exportjson.js
Google Spreadsheet JSON Export How-to at http://blog.pamelafox.org/2013/06/exporting-google-spreadsheet-as-json.html
// Includes functions for exporting active sheet or all sheets as JSON object (also Python object syntax compatible).
// Tweak the makePrettyJSON_ function to customize what kind of JSON to export.
var FORMAT_ONELINE = 'One-line';
var FORMAT_MULTILINE = 'Multi-line';
var FORMAT_PRETTY = 'Pretty';
var LANGUAGE_JS = 'JavaScript';
var LANGUAGE_PYTHON = 'Python';