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CGContextDrawImage draws image upside down when passed UIImage.CGImage
Does anyone know why CGContextDrawImage would be drawing my image upside down? I am loading an image in from my application:
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Windows batch: formatted date into variable
...can get the current date in a locale-agnostic way using
for /f "skip=1" %%x in ('wmic os get localdatetime') do if not defined MyDate set MyDate=%%x
Then you can extract the individual parts using substrings:
set today=%MyDate:~0,4%-%MyDate:~4,2%-%MyDate:~6,2%
Another way, where you get variab...
How to check if my string is equal to null?
...ontract:
From Object.equals(Object):
For any non-null reference value x, x.equals(null) should return false.
The way to compare with null is to use x == null and x != null.
Moreover, x.field and x.method() throws NullPointerException if x == null.
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Use of “global” keyword in Python
...global is only useful to change or create global variables in a local context, although creating global variables is seldom considered a good solution.
def bob():
me = "locally defined" # Defined only in local context
print(me)
bob()
print(me) # Asking for a global variable
The ab...
Cast Int to enum in Java
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Try MyEnum.values()[x] where x must be 0 or 1, i.e. a valid ordinal for that enum.
Note that in Java enums actually are classes (and enum values thus are objects) and thus you can't cast an int or even Integer to an enum.
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iOS 7 parallax effect in my view controller
...in my app with a few buttons and a pretty background image. (It's a simple xib with UIButtons on top of a UIImageView .)
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android: move a view on touch move (ACTION_MOVE)
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Something like this:
public class MyActivity extends Activity implements View.OnTouchListener {
TextView _view;
ViewGroup _root;
private int _xDelta;
private int _yDelta;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)...
iOS White to Transparent Gradient Layer is Gray
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Swift 3 Syntax,
UIColor(white: 1, alpha: 0).cgColor
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Writing string to a file on a new line every time
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You can do this in two ways:
f.write("text to write\n")
or, depending on your Python version (2 or 3):
print >>f, "text to write" # Python 2.x
print("text to write", file=f) # Python 3.x
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How to find elements by class
... edited Jan 1 '18 at 18:34
valex
2,60811 gold badge1818 silver badges2929 bronze badges
answered Feb 18 '11 at 12:04
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