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Drawable image on a canvas
...ly bitmaps. And it also means that you can re-use that same drawable again if only the size changes.
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Undo a merge by pull request?
Someone accepted a pull request which they shouldn't have. Now we have a bunch of broken code merged in. How do you undo a pull request? I was just going to revert the changes to the commit just before the merge, but I noticed that it merged in a bunch of commits. So now there are all these commits ...
Ruby / Rails - Change the timezone of a Time, without changing the value
...Suppose the target time to convert is after the D/ST transition while Time.now is before the change. Would that work ?
– Cyril Duchon-Doris
Oct 26 '16 at 18:42
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What is the purpose of .PHONY in a Makefile?
...y're not associated with files, e.g.:
.PHONY: clean
clean:
rm -rf *.o
Now make clean will run as expected even if you do have a file named clean.
In terms of Make, a phony target is simply a target that is always out-of-date, so whenever you ask make <phony_target>, it will run, independ...
Why does Iterable not provide stream() and parallelStream() methods?
...a dumb iterator in cases where Q (work per element) is
nontrivial.)
If Iterable had a stream() method, it would just wrap an Iterator with
a Spliterator, with no size information. But, most things that are
Iterable do have size information. Which means we're serving up
deficient st...
Copy multiple files in Python
...istdir() to get the files in the source directory, os.path.isfile() to see if they are regular files (including symbolic links on *nix systems), and shutil.copy to do the copying.
The following code copies only the regular files from the source directory into the destination directory (I'm assuming...
How to use Git?
... just edit the Answer (added an alternate to a dead link). If not, let me know. (I figured it's easier to just ask YOU than to find the rule on this)
– Clay Nichols
Aug 14 '16 at 16:22
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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
... by dragging a block and adding corresponding actions they want when a specific event occurs.
Unlike the traditional text-based programming, MIT App Inventor introduces an event-driven programming model. “Event” is a concept in computer science which refers to the user’s action, such as touch...
What should go into an .h file?
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The simplest question to ask yourself to determine what belongs where is "if I change this, will I have to change code in other files to make things compile again?" If the answer is "yes" it probably belongs in the header file; if the answer is "no" it probably belongs in the code file.
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Unnamed/anonymous namespaces vs. static functions
...nly. The static keyword applied to entity declared in namespace scope specifies its internal linkage. Entity declared in anonymous namespace has external linkage (C++/3.5) however it is guaranteed to live in uniquely named scope. This anonymity of unnamed namespace effectively hides its declaratio...