Posted on

ReactJS radio button

This entry is part 3 of 35 in the series React JS

http://jsbin.com/mozegodapa/edit?html,js,console,output

class App extends React.Component {

  setFruit(event) {
    console.log(event.target.value);
  }

  render() {
    return (
      <div onChange={this.setFruit.bind(this)}>
        <input type="radio" value="Apple" name="fruit"/> Apple
        <input type="radio" value="Orange" name="fruit"/> Orange
      </div>
     )
  }
}

ReactDOM.render(<App/>, document.getElementById('app'));
Posted on

Shuffle array in a class

This entry is part 33 of 41 in the series Swift

import UIKit

class ArrayObject : NSObject {
    
    var numbers = [1,2,3,4,5]
    
    func shuffleNumbers() {
        numbers.shuffle()
    }
}

extension MutableCollection where Indices.Iterator.Element == Index {
    /// Shuffles the contents of this collection.
    mutating func shuffle() {
        let c = count
        guard c > 1 else { return }
        
        for (unshuffledCount, firstUnshuffled) in zip(stride(from: c, to: 1, by: -1), indices) {
            let d: IndexDistance = numericCast(arc4random_uniform(numericCast(unshuffledCount)))
            guard d != 0 else { continue }
            let i = index(firstUnshuffled, offsetBy: d)
            swap(&self[firstUnshuffled], &self[i])
        }
    }
}

let array = ArrayObject()

array.shuffleNumbers()

print(array.numbers[1])