mjm

import Combine
import CoreData

extension NSManagedObjectContext {
    func changesPublisher<Object: NSManagedObject>(for fetchRequest: NSFetchRequest<Object>)
        -> ManagedObjectChangesPublisher<Object>
    {
        ManagedObjectChangesPublisher(fetchRequest: fetchRequest, context: self)
    }
}

gonzalezreal

/// A type that has an "empty" representation.
public protocol EmptyRepresentable {
  static func empty() -> Self
}

extension Array: EmptyRepresentable {
  public static func empty() -> Array<Element> {
    return Array()
  }
}

khanlou

import Foundation

struct Person: Codable {
    let name: String
}

let person = Person(name: "Soroush")

let archiver = NSKeyedArchiver(forWritingWith: NSMutableData())

khanlou

- (void)hideVolumeBezel {
    MPVolumeView *volumeView = [[MPVolumeView alloc] initWithFrame:CGRectZero];
    volumeView.clipsToBounds = YES;
    [self.view addSubview:volumeView];
}

- (void)beginDetectingVolumeClicks {
    AVAudioSession* audioSession = [AVAudioSession sharedInstance];
    [audioSession setActive:YES error:nil];
    [audioSession setCategory:AVAudioSessionCategoryAmbient error:nil];

haruair

#!/bin/bash
#
# hook script for swiftlint. It will triggered when you make a commit.
#
# If you want to use, type commands in your console.
# $ ln -s ../../pre-commit-swiftlint.sh .git/hooks/pre-commit
# $ chmod +x .git/hooks/pre-commit

LINT=$(which swiftlint)

gunjanpatel

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

alskipp

// Create an `Observable` of Optional<Int>
let values: Observable<Int?> = [1, 2, .None, 3, .None, 4, 5].toObservable()


// Method 1: using a free function
// Requires passing the function to `flatMap`

func ignoreNil<A>(x: A?) -> Observable<A> {
  return x.map { Observable.just($0) } ?? Observable.empty()
}

dperini

//
// Regular Expression for URL validation
//
// Author: Diego Perini
// Created: 2010/12/05
// Updated: 2018/09/12
// License: MIT
//
// Copyright (c) 2010-2018 Diego Perini (http://www.iport.it)
//