karlding

Android fastboot flashing

Here are some instructions on how to successfully flash a new Android System Image.

Preparation

First download and extract the Android System Image that you want to flash. I'll be using hammerhead-mob30h, which is the May security update for my Nexus 5 (2013).

Extract the archive and enter the directory. You'll also want to extract the image-*.zip file as well (image-hammerhead-mob30h.zip in my case), which contains the other img files.

cd ~/Downloads/image-hammerhead-mob30h

karlding

var system = require('system');
var casper = require('casper').create({
  pageSettings: {
    loadImages: true,
    loadPlugins: false,
    userAgent: 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36'
  }
});

// read from cin to prevent login credentials being stored in bash history

karlding

// ==UserScript==
// @name         JobMine4Days
// @namespace    https://github.com/karlding
// @version      1.1
// @description  Prevents uWaterloo's JobMine system from logging you out automatically
// @author       Karl Ding
// @include      https://jobmine.ccol.uwaterloo.ca/psp/SS*
// @include      https://jobmine.ccol.uwaterloo.ca/psc/SS*
// @include      https://jobmine.ccol.uwaterloo.ca/psp/ES*
// @include      https://jobmine.ccol.uwaterloo.ca/psc/ES*

karlding

import xml.dom.minidom
import sys

data = "".join(sys.stdin)

dom = xml.dom.minidom.parseString(data)
ligature_sets = dom.getElementsByTagName('LigatureSet')
char_map = dom.getElementsByTagName('cmap')[0].getElementsByTagName('cmap_format_4')[0].getElementsByTagName('map')

for ligature_set in ligature_sets:

karlding

iTunes Artist Photos

The iTunes API doesn't provide a way to grab artist images, but the iTunes website uses Open Graph meta tags, which embeds a meta tag with a property attribute value set to og:image. As it turns out, this seems to be the same image used in the iTunes artwork.

The URL structure is similar to the artworkUrl values returned by the API, but what concerns us here is the part I've indicated at the end of the URL.

http://is3.mzstatic.com/image/thumb/Music7/v4/68/68/41/68684190-833b-bfb4-5018-e5a2e6f69eb0/source/1200x630bf.jpg
                                                                                                   └─ widthxheight

karlding

// register map
#define ADD        0x20
#define SUB        0x22
#define MULT       0x18
#define MULTU      0x19
#define DIV        0x1a
#define DIVU       0x1b
#define MFHI       0x10
#define MFLO       0x12
#define LIS        0x14

karlding

#include <iostream>
#include <stack>
#include <vector>
using namespace std;

int main() {
  string s;
  stack<int> st;
  while (cin >> s) {
    int i;

karlding

// print out array in zigzag format
// time: O(n log n) = O(n log n) + O(n log n) + O(n)
// space: O(3n)
std::vector<int> zigZagArray(std::vector<int> intArray) {
  std::vector<int> v(intArray);
  // sort descending order
  std::sort(intArray.rbegin(), intArray.rend());
  // sort asc
  std::sort(v.begin(), v.end());

karlding

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Narrator.exe]
"Debugger"="%1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\AtBroker.exe]
"Debugger"="%1"

karlding

# set the compiler name
CXX = g++

# set the compiler flags
#   Wall: show all warnings
#   MMD: create dependency files
#   g: compile binaries with debugging info
CXXFLAGS = -Wall -MMD -g

# object files