Use regular expression to filter telephone number in JavaScript

function checkPhoneNumber(phone) {
    var regexp = /^(?:(?:\(?(?:00|\+)([1-4]\d\d|[1-9]\d?)\)?)?[\-\.\ \\\/]?)?((?:\(?\d{1,}\)?[\-\.\ \\\/]?){0,})(?:[\-\.\ \\\/]?(?:#|ext\.?|extension|x)[\-\.\ \\\/]?(\d+))?$/i
    if (regexp.test(phone) && phone.length > 0) {
        return true;
    } else {
        return false;
    }
}

Import image from photo library into app in swift

Add  UIImagePickerControllerDelegate, UINavigationControllerDelegate  at top of the class.

 

Before viewDidLoad()

var picker = UIImagePickerController()

 

In viewDidLoad() or any function that you want to use image picker

picker.delegate = self

 

Add some function for catch event

// What to do when the picker returns with a photo
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    let chosenImage = info[UIImagePickerControllerEditedImage] as! UIImage
    dismissViewControllerAnimated(true, completion: nil)
    addAvatar(chosenImage) //Use image that user pick from library
}

// What to do if the image picker cancels.
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    dismissViewControllerAnimated(true, completion: {() in
                // some code for do anything when user cancel to import image
    })
}


UIScrollView in Swift

Code for create UIScrollView (which named scrollView) and specify size of content (width and height) inside scrollView.

var scrollView = UIScrollView(frame: containerView.frame)

scrollView.contentSize = CGSize(width: 3000, height: 2000)

containerView.addSubview(scrollView)

// can be any view that is container of scrollView

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Data-binding

Link of information about Data-binding Revolutions with Object.observe()

http://www.html5rocks.com/en/tutorials/es7/observe/

Material icons from Google

Material flat icons for web, Android, and iOS projects.

https://www.google.com/design/icons/