cozzin

@property CGFloat currentKeyboardHeight;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *btnBottomConstraint;

cozzin

package com.dotincorp.android.util;

import android.graphics.Bitmap;
import android.graphics.Color;
import android.os.AsyncTask;
import android.util.Log;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;

cozzin

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
  // push received
}

cozzin

git init
git add .
git commit -m "First commit"
git remote add origin 원격_저장소_URL
git remote -v
git push -u origin master

cozzin

// https://teamtreehouse.com/community/i-dont-understand-get-and-get-set

protocol TestProtocol {
    var testVar: Int { get }
}

class TestClass: TestProtocol {
    var testVar: Int = 0
}

cozzin

extension DispatchQueue {
    public func async(execute work: @escaping () -> Void, complete: @escaping () -> Void) {
        async(execute: [work], complete: complete)
    }
    
    public func async(execute works: [() -> Void], complete: @escaping () -> Void) {
        let dispatchGroup = DispatchGroup()
        works.forEach { work in
            async(group: dispatchGroup) {
                work()

cozzin

# https://janikarhunen.fi/how-to-install-python-3-6-1-on-centos-7.html
# Install the necessary utilities

sudo yum update
sudo yum install yum-utils
sudo yum groupinstall development

sudo yum install https://centos7.iuscommunity.org/ius-release.rpm
sudo yum install python36u
sudo yum install python36u-pip

cozzin

extension UITableView {
   func reloadDataAndKeepOffset() {
       let offset = contentOffset
       reloadData()
       layoutIfNeeded()
       setContentOffset(offset, animated: false)
   }
}

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class ViewController: UIViewController {

    private var cellHeightsDictionary: [String: CGFloat] = [:]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // set table view ...
        tableView.rx.setDelegate(self).disposed(by: disposeBag)
    }

cozzin

func formatByteCount(bytes: Int64) -> String {
    let byteCountFormatter = ByteCountFormatter()
    return byteCountFormatter.string(fromByteCount: bytes)
}