masking

I want to make user inputted phone number in an editText to dynamically change format every time the user inputs a number. That is, when user inputs up to 4 digits, like 7144, the editText shows "714-4". I would like the editText to be dynamically updated to format ###-###-#### whenever the user inputs a digit. how can this be done? also, I am handling more than one editTexts. brockoli Easiest way to do this is to use the built in Android PhoneNumberFormattingTextWatcher . So basically you get your EditText in code and set your text watcher like this... EditText inputField = (EditText)

I'm working on an app where I draw a UIView via code and I fill it with a UIColor. Next thing I want to load a mask.png file (no transparency, just black and white) and mask the UIView to change its visual appearance. Any idea how to do this? // Create your mask layer CALayer* maskLayer = [CALayer layer]; maskLayer.frame = CGRectMake(0,0,yourMaskWidth ,yourMaskHeight); maskLayer.contents = (__bridge id)[[UIImage imageNamed:@"yourMaskImage.png"] CGImage]; // Apply the mask to your uiview layer yourUIView.layer.mask = maskLayer; Remember to import QuartzCore and add the framework #import

Example: from __future__ import division import numpy as np n = 8 """masking lists""" lst = range(n) print lst # the mask (filter) msk = [(el>3) and (el<=6) for el in lst] print msk # use of the mask print [lst[i] for i in xrange(len(lst)) if msk[i]] """masking arrays""" ary = np.arange(n) print ary # the mask (filter) msk = (ary>3)&(ary<=6) print msk # use of the mask print ary[msk] # very elegant and the results are: >>> [0, 1, 2, 3, 4, 5, 6, 7] [False, False, False, False, True, True, True, False] [4, 5, 6] [0 1 2 3 4 5 6 7] [False False False False True True True False] [4 5 6] As you see