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View Border in TableView Sections
Extension for UITableViewController or UIViewController as you prefer
extension UITableViewController {
func colorSection(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
let cornerRadius: CGFloat = 0.0
cell.backgroundColor = UIColor.clear
let layer: CAShapeLayer = CAShapeLayer()
let pathRef: CGMutablePath = CGMutablePath()
//dx leading an trailing margins

How to draw a gradient border button?

My Problem

Last week, my partner showed me his design for our application. Everything is great, easily implemented with some custom controls. But wait, something is not in my knowledge.

A button with gradient border. Never try it before. Up to now, I just created gradient background views 2 times in previous projects. Googled and found some good results.

# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName
View TimeStampToDate.swift
func formatterDate(stringDate: String) -> Date? {
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSSxxxxx"
formatter.timeZone = Calendar.current.timeZone
formatter.locale = Calendar.current.locale
guard let newDate = stringDate) else { return nil }
return newDate
let stringDate = formatterDate(stringDate: "2018-08-30T15:26:27.357902-03:00")
View StringDynamicParameterVariable.swift
var str = "Hello %@, welcome to playground"
let tvar = String(format: NSLocalizedString(str, comment: "%@"), "Mike")
View SorteioDeNomes
var convidados: [String] = []
var randomNum = arc4random_uniform(UInt32(convidados.count))
print("Sorteio CocoaHeads POA Agosto 2018 \n\n")
var str = "O(A) Vencedor(a) é >> \(convidados[Int(randomNum)]) <<"
View UIControl+ListenBlock.swift
import Foundation
import UIKit
extension UIControl {
func listen(_ action: @escaping () -> (), for controlEvents: UIControlEvents) -> AnyObject {
let sleeve = ClosureSleeve(attachTo: self, closure: action, controlEvents: controlEvents)
addTarget(sleeve, action: #selector(ClosureSleeve.invoke), for: controlEvents)
return sleeve
View Rename.go
package main
import (
View gist:db0116041c48d3d0d3643c7f046fa061

1. Clone your fork:

git clone

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://
git fetch upstream

Install Multiple Java Versions on macOS High Sierra

Install Homebrew Cask

On Mac, Homebrew is the de-facto package manager, and Homebrew Cask is the app manager. I’m going to use Cask to install Java 7 and 9.

Install Homebrew Cask first if you haven’t:

brew update
brew tap caskroom/cask