wongzigii

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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wongzigii

#!/bin/bash
#
# 通过对比 ping 响应时间，找到本机最快的上传ip
# [email protected]
#

function refresh_host()
{
  IP="$1"
  UPLOAD_HOST="upload.qiniu.com"

wongzigii

This was nice and fast... but it takes up WAY TOO MUCH space. And it's annoying to write.
(I like the way I can just step into the function that calls the delegate for debugging)

What's a better way to not make me call respondsToSelector in the middle of my code? Some proxy?

    struct {
        unsigned int delegateWillDisplayDocument:1;
        unsigned int delegateDidDisplayDocument:1;
        unsigned int delegateDidShowPageView:1;
        unsigned int delegateDidRenderPageView:1;

wongzigii

- (void)resetCoreData {
    
    DDLogInfo(@"[RESET-COREDATA] Started.");
    
    [MagicalRecord cleanUp];
    
    NSURL *storeURL = [NSPersistentStore MR_urlForStoreName:kMobilStoreName];
    NSURL *walURL = [[storeURL URLByDeletingPathExtension] URLByAppendingPathExtension:@"sqlite-wal"];
    NSURL *shmURL = [[storeURL URLByDeletingPathExtension] URLByAppendingPathExtension:@"sqlite-shm"];
    

wongzigii

/*
For example, you use Core Data sqlite.
It is necessary, because sqlite database stores data in single file.
Whole database is single file.

Now you have two options.
1. Delete all data from all tables
2. Delete database sqlite file

Second option is clean but complex.

wongzigii

#!/bin/bash
find -E $(xcode-select --print-path) -regex '.*___\.(c|h|m|swift)' -print0 | xargs -0 -n 1 sed -i '' '1,/^$/d'

wongzigii

@interface ViewController ()
@property (strong, nonatomic) UIScrollView* vScrollView;
@end

@implementation ViewController

- (void)viewDidLoad
{
  [super viewDidLoad];
  

wongzigii

//clang++ -std=c++11 -stdlib=libc++ -framework Foundation nsarray.mm -o nsarray
/* Note:
 * - libstdc++ has been frozen by Apple at a pre-C++11 version, so you must opt
     for the newer, BSD-licensed libc++
 * - Apple clang 4.0 (based on LLVM 3.1svn) does not default to C++11 yet, so
     you must explicitly specify this language standard. */
/* @file nsarray.mm
 * @author Jeremy W. Sherman
 *
 * Demonstrates three different approaches to converting a std::vector

wongzigii

# Create a container from the mongo image, 
#  run is as a daemon (-d), expose the port 27017 (-p),
#  set it to auto start (--restart)
#  and with mongo authentication (--auth)
# Image used is https://hub.docker.com/_/mongo/
docker pull mongo
docker run --name YOURCONTAINERNAME --restart=always -d -p 27017:27017 mongo mongod --auth

# Using the mongo "localhost exception" (https://docs.mongodb.org/v3.0/core/security-users/#localhost-exception) 
# add a root user

wongzigii

//  Created by Vasily Ulianov on 09.02.17, updated in 2019.
//  License: MIT

import Foundation

/// Subclass of `Operation` that adds support of asynchronous operations.
/// 1. Call `super.main()` when override `main` method.
/// 2. When operation is finished or cancelled set `state = .finished` or `finish()`
open class AsynchronousOperation: Operation {
    public override var isAsynchronous: Bool {