PiN73

https://leetcode.com/problems/max-stack

https://www.lintcode.com/problem/859

Design a max stack that supports:

1. push(x): Push element x onto stack.
2. pop(): Remove the element on top of the stack and return it.
3. top(): Get the element on the top.
4. peekMax(): Retrieve the maximum element in the stack.
5. popMax(): Retrieve the maximum element in the stack, and remove it. If you find more than one maximum elements, only remove the top-most one.

PiN73

/////////////////////////////////////////////////////////
// Copied from http://www.alecjacobson.com/weblog/?p=3816
/////////////////////////////////////////////////////////
#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#import <unistd.h>
BOOL copy_to_clipboard(NSString *path)
{
  // http://stackoverflow.com/questions/2681630/how-to-read-png-image-to-nsimage
  NSImage * image;

PiN73

import 'dart:async';

class MyStream {
  late final  _controller = StreamController<String>.broadcast(
    onListen: _startTimer,
    onCancel: _stopTimer,
  );

  Timer? _timer;

PiN73

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(

PiN73

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(

PiN73

import 'package:flutter/material.dart';

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

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Home(),
    );

PiN73

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

PiN73

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

PiN73

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp();

PiN73

By default, <ItemsControl>/<ScrollViewer> doesn't use virtualization. All its items are rendered at once. This causes lags/freezing on first render and each re-render (for example, if list data or window size changes).

Adding ScrollViewer.CanContentScroll="True" will enable virtualization and make loading fast. But the list will be scrolled one whole item a time, which feels like jumping if items height is big enough.

To make virtualization enabled and keep smooth scrolling, add also VirtualizingPanel.ScrollUnit="Pixel"