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Adding placeholder text to textbox
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Instead of handling the focus enter and focus leave events in order to set and remove the placeholder text it is possible to use the Windows SendMessage function to send EM_SETCUEBANNER message to our textbox to do the work for us.
This can be done with two easy steps. First we need t...
Does Python optimize tail recursion?
...on't need such a feature, I am very happy
with the code above. However, in order to provide a more general module, I thought
a little more in order to find some workaround for this issue (see next section).
Concerning the speed of this process (which isn't the real issue however), it happens
to be ...
Python unit test with base and sub class
... This method only works for setUp and tearDown methods if you reverse the order of the base classes. Because the methods are defined in unittest.TestCase, and they don't call super(), then any setUp and tearDown methods in CommonTests need to be first in the MRO, or they won't be called at all.
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How to replace plain URLs with links?
...-zA-Z]{2,6} should read something along the lines of (?:[a-zA-Z]{2,6})+ in order to match more complicated domain names, i.e. email@example.co.uk.
– Roshambo
Aug 19 '11 at 15:07
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How do you compare two version Strings in Java?
...oid Good point, Unless you expect '4.1' == '4.1.0' I think this is a sense ordering.
– Peter Lawrey
Nov 28 '14 at 15:09
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Setting an object to null vs Dispose()
...n the case where the user of the type has forgotten to dispose of it in an orderly manner. So if you open a FileStream but forget to call Dispose or Close, the finalizer will eventually release the underlying file handle for you. In a well-written program, finalizers should almost never fire in my o...
How to find the Windows version from the PowerShell command line
...y all of them. In that respect I think BuildLabEx, Kernel and HAL (in that order) would be the most appropriate way to give a more proper version. But since you seem to know what is wrong, you should post what is right.
– not2qubit
Dec 11 '18 at 8:42
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What do we mean by Byte array? [closed]
...guous (side by side) bytes, such that it makes sense to talk about them in order: the first byte, the second byte etc..
Just as bytes can encode different types and ranges of data (numbers from 0 to 255, numbers from -128 to 127, single characters using ASCII e.g. 'a' or '%', CPU op-codes), each by...
Prevent users from submitting a form by hitting Enter
...ys:
A form element's default button is the first submit button in tree order whose form owner is that form element.
If the user agent supports letting the user submit a form implicitly (for example, on some platforms hitting the "enter" key while a text field is focused implicitly submits t...
What's the difference between QMainWindow, QWidget and QDialog?
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