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What's the rationale for null terminated strings?
...ple library function
efficient for the main use of strings : constant text read
sequentially from a known start
(mostly messages to the user).
the terminating zero is not even mandatory, all necessary tools
to manipulate chars like a bunch of
bytes are available. When performing
array initialisation...
Difference between Service, Async Task & Thread?
What is the difference between Service, Async Task & Thread. If i am not wrong all of them are used to do some stuff in background. So, how to decide which to use and when?
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Core dumped, but core file is not in the current directory?
...
Read /usr/src/linux/Documentation/sysctl/kernel.txt.
[/proc/sys/kernel/]core_pattern is used to specify a core dumpfile pattern name.
If the first character of the pattern is a '|', the kernel will treat
the rest of the pat...
“Java DateFormat is not threadsafe” what does this leads to?
Everybody cautions regarding Java DateFormat not being thread safe and I understand the concept theoretically.
11 Answers
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Using column alias in WHERE clause of MySQL query produces an error
...in the comments, using HAVING instead may do the work. Make sure to give a read at this WHERE vs HAVING though.
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Why are global variables evil? [closed]
...ll make testing harder as well.
Furthermore, if you consider other people reading your code (open-source community, colleagues etc) they will have a hard time trying to understand where the global variable is being set, where has been changed and what to expect from this global variable as opposed ...
Why doesn't Java offer operator overloading?
...-- operator+ would likely deal with values and objects, but operator= is already implemented to deal with references.
In C++, you should only be dealing with one kind of comparison at a time, so it can be less confusing. For example, on Complex, operator= and operator== are both working on values -...
Covariance, Invariance and Contravariance explained in plain English?
Today, I read some articles about Covariance, Contravariance (and Invariance) in Java. I read the English and German Wikipedia article, and some other blog posts and articles from IBM.
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Determining Whether a Directory is Writeable
...ss:
os.access('/path/to/folder', os.W_OK) # W_OK is for writing, R_OK for reading, etc.
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How do I make Git ignore file mode (chmod) changes?
...refully. This setting only covers the executable bit of mode and never the read/write bits. In many cases you think you need this setting because you did something like chmod -R 777, making all your files executable. But in most projects most files don't need and should not be executable for securit...