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HTML5 check if audio is playing?
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While I am really late to this thread, I use this implementation to figure out if the sound is playing:
service.currentAudio = new Audio();
var isPlaying = function () {
return service.currentAudio
&& service.currentAudio.currentTime &g...
What does “coalgebra” mean in the context of programming?
...find or come up with a good example or two :P.
Classes and Objects
After reading around a bit, I think I have a good idea of how to use coalgebras to represent classes and objects. We have a type C that contains all the possible internal states of objects in the class; the class itself is a coalge...
Show pending migrations in rails
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How do you read the output of this command? If the status of a row is "down", does that mean it's a pending migration?
– Dennis
Feb 13 '15 at 15:00
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What is the purpose of the -m switch?
...hich are part of a package, etc. That's what the rest of PEP 338 is about. Read it for more info.
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Android - How to get application name? (Not package name)
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while reading App Name from string.xml, sometimes, am getting junk characters. I dont know why ..Ex: स्कैनर
– harikrishnan
Oct 17 '16 at 9...
Why do pthreads’ condition variable functions require a mutex?
I’m reading up on pthread.h ; the condition variable related functions (like pthread_cond_wait(3) ) require a mutex as an argument. Why? As far as I can tell, I’m going to be creating a mutex just to use as that argument? What is that mutex supposed to do?
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How can I use “” in javadoc without formatting?
... to use markdown, you can just surround it with backticks.
`A<B>C` reads a bit nicer than {@code A<B>C}
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Deleting folders in python recursively
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The command (given by Tomek) can't delete a file, if it is read only. therefore, one can use -
import os, sys
import stat
def del_evenReadonly(action, name, exc):
os.chmod(name, stat.S_IWRITE)
os.remove(name)
if os.path.exists("test/qt_env"):
shutil.rmtree('test/qt_en...
Is C++ context-free or context-sensitive?
... (Grammar symbols may be either terminals or non-terminals).
This can be read as A &rightarrow; γ only in the context [α, β]. In a context-free (Type 2) grammar, α and β must be empty.
It turns out that you can also restrict grammars with the "monotonic" restriction, where every producti...
mysql -> insert into tbl (select from another table) and some default values [duplicate]
...ant to write on the first line, and the column names from the table you're reading go on the second ligne. So in this answer, catid and title don't point to the same table.
– A.L
Feb 4 '15 at 17:33
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