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How to use Git?
... who spends most of his spare time watching TV rather than coding. So basically I have zero experience with any kind of version control system. My understanding is somehow they make distribution of projects easier.
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What are metaclasses in Python?
...ass is an instance of a metaclass.
While in Python you can use arbitrary callables for metaclasses (like Jerub shows), the better approach is to make it an actual class itself. type is the usual metaclass in Python. type is itself a class, and it is its own type. You won't be able to recreate somet...
Assembly code vs Machine code vs Object code?
...e to machine code with the use of an assembler or a compiler, though we usually think of compilers in association with high-level programming language that are abstracted further from the CPU instructions.
Building a complete program involves writing source code for the program in either assembly or...
What is the difference between $(command) and `command` in shell programming?
... for portability issues it is recommended to use backticks for non-nested calls. $(...) needs a recursive parser but this was not used with ksh86 that introduced the feature. Check in-ulm.de/~mascheck/various/cmd-subst for a list of correct implementations. A conforming shell needs to support all c...
How do I view all commits for a specific day?
...:00" --until="2013-11-13 00:00" & would also work if you have gitk installed.
– HelloGoodbye
Mar 4 '16 at 12:50
6
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How do I use pagination with Django class based generic ListViews?
...el = models.Car # shorthand for setting queryset = models.Car.objects.all()
template_name = 'app/car_list.html' # optional (the default is app_name/modelNameInLowerCase_list.html; which will look into your templates folder for that path and file)
context_object_name = "car_list" #de...
Capitalize the first letter of both words in a two word string
...ting the tolower function inside thee simpleCap function you can deal with all capped words too:is code you can deal: <br/> name <- c("george wasHINgton","tom jefferson", "ABE LINCOLN") simpleCap <- function(x) { s <- tolower(x) s <- strsplit(s, " ")[[1]] paste(toupp...
Why would you ever implement finalize()?
...uestions on finalize() and find it kind of bewildering that no one has really made it plain that finalize() is an unreliable way to clean up resources. I saw someone comment that they use it to clean up Connections, which is really scary since the only way to come as close to a guarantee that a C...
How can I manually generate a .pyc file from a .py file
...n not depend on Python's "import" statement to generate .pyc file automatically
8 Answers
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Locking pattern for proper use of .NET MemoryCache
...t collection that has thread safe reads but non-thread safe writes (almost all of classes under the System.Collections namespace is like that).
Here is how I would do it using ReaderWriterLockSlim to protect access. You need to do a kind of "Double Checked Locking" to see if anyone else created the...