LaZyQ zyqhi

Cycript on Mojave

Cycript is a tool I find very helpful. It's an effective REPL for Objective-C. When I updated to macOS Mojave, I found that cycript no longer worked because it was linked against an old version of Ruby. After attempting to compile from source, I tried another solution. install_name_tool is an open source tool for modifying the names of linked shared libraries in a Mach-O.

Solution

$ install_name_tool -change /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/libruby.2.0.0.dylib /System/Library/Frameworks/Ruby.framework/Versions/Current/usr/lib/libruby.dylib Cycript.lib/cycript-apl
$ install_name_tool -change /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/libruby.2.0.0.dylib /System/Library/Frameworks/Ruby.framework/Versions/Current/usr/lib/libruby.dylib Cycript.lib/libcycript.dylib

Flutter

A quick cheatsheet of useful snippet for Flutter

Widget

A widget is the basic type of controller in Flutter Material. There are two type of basic Widget we can extend our classes: StatefulWidget or StatelessWidget.

Stateful

StatefulWidget are all the widget that interally have a dynamic value that can change during usage. It can receive an input value in the constructor or reference to functions. You need to create two classes like:

Scrabs from : https://gist.github.com/jsturgis/3b19447b304616f18657

How to use Hexo and deploy to GitHub Pages

1. Install Hexo

$ sudo npm install -g hexo-cli

$ hexo -v
hexo-cli: 0.1.9

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

	import 'dart:async';

	import 'package:flutter/material.dart';
	import 'package:rect_getter/rect_getter.dart';

	void main() => runApp(new MyApp());

	class MyApp extends StatelessWidget {
	@override
	Widget build(BuildContext context) {

	#!/bin/bash
	export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
	ether=[iPhone's MAC address]
	iface=[interface via witch the host connects to the iPhone]
	mdns_ip=224.0.0.251 #the multicast address used by mDNS

	#lookup iPhone's IP from its MAC address
	ip_raw=$(arp -n -H ether -i $iface \| grep $ether )
	if [[ -z "$ip_raw" ]]
	then

	//
	// Simple listener.c program for UDP multicast
	//
	// Adapted from:
	// http://ntrg.cs.tcd.ie/undergrad/4ba2/multicast/antony/example.html
	//
	// Changes:
	// * Compiles for Windows as well as Linux
	// * Takes the port and group on the command line
	//


	- (void)testFilter {
	RACSignal *signal = [@[ @1, @2, @3 ] rac_sequence].signal;
	signal = [signal filter:^BOOL(NSNumber *value) {
	return value.integerValue % 2;
	}];
	[signal subscribeNext:^(NSNumber *value) {
	NSLog(@"%@", value);
	}];
	}

	# The trick is to link the DeviceSupport folder from the beta to the stable version.
	# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

	# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
	sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

	# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

	# (A similar approach works for older versions too, just change the version number after DeviceSupport)