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CALayer with transparent hole in it

...olor; fillLayer.opacity = 0.5; [view.layer addSublayer:fillLayer]; Swift 3.x: let radius = myRect.size.width let path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: self.mapView.bounds.size.width, height: self.mapView.bounds.size.height), cornerRadius: 0) let circlePath = UIBezierPath(rou...
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Check if Python Package is installed

... If you mean a python script, just do something like this: Python 3.3+ use sys.modules and find_spec: import importlib.util import sys # For illustrative purposes. name = 'itertools' if name in sys.modules: print(f"{name!r} already in sys.modules") elif (spec := importlib.util.find_sp...
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How to put multiple statements in one line?

...| edited Dec 22 '17 at 10:31 Matthew Murdoch 28.1k2525 gold badges8686 silver badges124124 bronze badges ...
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Adding a favicon to a static HTML page

... | edited Jun 1 at 8:30 aravk33 37766 silver badges1717 bronze badges answered Mar 30 '12 at 13:19 ...
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Can't access object property, even though it shows up in a console log

..., but on the very next line of code, I can't access it with config.col_id_3 (see the "undefined" in the screenshot?). Can anyone explain this? I can get access to every other property except field_id_4 as well. ...
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Best practice multi language website

... 13 Answers 13 Active ...
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Neither BindingResult nor plain target object for bean name available as request attribute [duplicat

I'm just learning the ropes of Spring 3's annotation fu and I've stumbled upon the newb's nightmare exception. Would appreciate any help. ...
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Importing CommonCrypto in a Swift framework

... 137 Something a little simpler and more robust is to create an Aggregate target called "CommonCrypt...
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Getting a list item by index

... 377 list1[0]; Assuming list's type has an indexer defined. ...
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How to migrate/convert from SVN to Mercurial (hg) on windows

... 93 I just had to tackle this problem myself. I have a windows XP machine with a separate windows s...