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I hereby claim:

  • I am nyg on github.
  • I am ngaranis ( on keybase.
  • I have a public key ASB-F2fnOPuIOpWWLKsB-b8ZJ0MNhPoXSvSdblQLuYfBzQo

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nyg /
Created Apr 2, 2019
Script to recursively extract archives
#!/usr/bin/env bash
# Usage: /absolute/path/to/ /absolute/path/to/folder/with/archive
for file in $1/* ; do
if [ -f "$file" ] ; then
echo Found file: $file
info=$(file $file | tr '[:upper:]' '[:lower:]')
nyg /
Created Mar 16, 2019
Download El Capitan from Apple's servers.
#!/usr/bin/env sh
# Requires wget.
# Does not work on Mojave because of the new App Store.
# Inspiration source:
# (and comments)
# See also:
View div_euc_hex.c
#include <stdio.h>
int main(int argc, const char** argv) {
unsigned int a = 0xDEADBEEF;
unsigned int b = 0xBABE;
unsigned int q = a / b;
unsigned int r = a % b;
printf("%u = %u * %u + %u\n", a, q, b, r);
nyg / EXIFUserComment.swift
Last active Dec 31, 2019
Get and set an EXIF UserComment to a JPEG image using the ImageIO framework.
View EXIFUserComment.swift
// Note: to add a JPEG COM marker go here:
import Foundation
import ImageIO
#if os(iOS)
import MobileCoreServices
nyg /
Created Sep 15, 2017
Basic code example for AsynchronousServerSocketChannel.
AsynchronousServerSocketChannel listener = InetSocketAddress(ip, port));
while (true) {
Future<AsynchronousSocketChannel> future = listener.accept();
AsynchronousSocketChannel channel = future.get();
ByteBuffer buffer = ByteBuffer.allocate(5000);
Future<Integer> byteCount =;
System.out.println("Bytes read: " + byteCount.get());
nyg / AddJPEGComment.swift
Last active Sep 20, 2017
Add a JPEG comment marker to file in pure Swift.
View AddJPEGComment.swift
// Inspired by wrjpgcom of libjpeg
// Note: To add an EXIF UserComment go here:
import Foundation
nyg / Serialize.swift
Created Aug 29, 2017
Serialize NSObject (or array of) to XML in Swift.
View Serialize.swift
import Foundation
class MyClass: NSObject, NSCoding {
var name: String
var age: Int
init(name: String, age: Int) { = name
self.age = age
nyg / MemoryAddress.swift
Last active Feb 22, 2020
Get the memory address of both class and structure instances in Swift.
View MemoryAddress.swift
import Foundation
struct MemoryAddress<T>: CustomStringConvertible {
let intValue: Int
var description: String {
let length = 2 + 2 * MemoryLayout<UnsafeRawPointer>.size
nyg / uptime.c
Last active Aug 14, 2017
Get boot time and uptime on macOS in C
View uptime.c
// Tested on macOS 10.12.
// Usage:
// $ clang uptime.c && ./a.out
// boot time (UNIX time): 1502299682.147510
// uptime (seconds): 410563.269028116
#include <stdlib.h>
#include <errno.h>
#include <string.h>
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