CaiJingLong

#!/bin/bash

NDK=/Volumes/Samsung-T5/sdk/android-ndk-r21b
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/darwin-x86_64
API=21

function build_android() {
    cd ffmpeg-4.3.1
    echo "Compiling FFmpeg for $CPU"
    ./configure \

CaiJingLong

// ==UserScript==
// @name         Shard in dartpad
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       Caijinglong
// @match        https://dartpad.cn/*
// @match        https://dartpad.dev/*
// @grant        none
// @require      https://code.jquery.com/jquery-3.4.1.min.js

CaiJingLong

main(List<String> arguments) {
  final r = RegExp(r'\s(@(\S+))');
  final str = '@abc adkj  sfksjdlfj@@@fjdlksjf @abc@aa df  @@@ccc @dfj @你好';
  final matches = r.allMatches(" " + str);
  for (final match in matches) {
    //    print(match.group(1)); // 带@符号的
    print(match.group(2)); // 不带@符号的
  }
}

CaiJingLong

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',

CaiJingLong

void main() {
  print(range(100, start: 1, step: 7));
}

Iterable<int> range(int end, {int start = 0, int step = 1}) sync* {
  assert(step >= 1);
  int r = start;

  while (r < end) {
    yield r;

CaiJingLong

package top.kikt.imagescanner.util


import android.os.Handler
import android.os.Looper
import io.flutter.plugin.common.MethodChannel

class ResultHandler(var result: MethodChannel.Result?) {

    companion object {

CaiJingLong

typedef void ForEachHandle<T>(int index, T item);

extension _A<T> on List<T> {
  void forEachIndexed(void func(int index, T item)) {
    for (var i = 0; i < this.length; i++) {
      func(i, this[i]);
    }
  }

  void forEachIndexed2(void Function(int index, T item) func) {

CaiJingLong

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

import 'dart:math';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override

CaiJingLong

import "package:flutter/material.dart";

void main() {
  runApp(
    MaterialApp(
      home: Container(
        color: Colors.red,
        child: Stack(
          children: [
            Align(

CaiJingLong

# remove iOS bitcode

flutter build ios
cd build/ios/iphoneos/Runner.app/Frameworks
cd App.framework
xcrun bitcode_strip -r app -o app
cd ..
cd Flutter.framework
xcrun bitcode_strip -r Flutter -o Flutter
cd ../../../../../../