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@hnvn
hnvn / flutter_flip_animation_4.dart
Last active May 7, 2024 15:35
import 'package:flutter/material.dart';
import 'dart:math' as math;
import 'dart:async';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
@leommoore
leommoore / file_magic_numbers.md
Last active September 24, 2024 10:16
File Magic Numbers

File Magic Numbers

Magic numbers are the first bits of a file which uniquely identify the type of file. This makes programming easier because complicated file structures need not be searched in order to identify the file type.

For example, a jpeg file starts with ffd8 ffe0 0010 4a46 4946 0001 0101 0047 ......JFIF.....G ffd8 shows that it's a JPEG file, and ffe0 identify a JFIF type structure. There is an ascii encoding of "JFIF" which comes after a length code, but that is not necessary in order to identify the file. The first 4 bytes do that uniquely.

This gives an ongoing list of file-type magic numbers.

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@anorth
anorth / ZoomLayout.java
Created March 29, 2014 00:06
Pinch-zoomable Android frame layout
package au.id.alexn;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.view.View;
import android.widget.FrameLayout;