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Do spurious wakeups in Java actually happen?
...was outside the futex system call. This race condition can only be avoided by the caller checking for an invariant. A POSIX signal will therefore generate a spurious wakeup.
Summary: If a Linux process is signaled its waiting threads will each enjoy a nice, hot spurious wakeup.
I buy it. That's a...
What exactly does a jar file contain?
...data about the jar itself). It's hard to compare C to Java really, as Java byte code maintains a lot more metadata than most binary formats - but the class file is compiled code instead of source code.
If you either open the jar file with a zip utility or run jar xf foo.jar you can extract the file...
Error handling in C code
...ea makes multi-threaded use a bit difficult." Which part is made difficult by multi-threading? Can you give a quick example?
– SayeedHussain
Jun 18 '13 at 9:57
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Changing the size of a column referenced by a schema-bound view in SQL Server
... Remus, the view does have SCHEMABINDING defined. is there any easy way of bypassing the constrain or do i really need to remove the views to get it working?
– Staelen
Aug 24 '09 at 5:26
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Is it good practice to use java.lang.String.intern()?
...vor to String.equals()
when you need speed since you can compare strings by reference (== is faster than equals)
Are there side effects not mentioned in the Javadoc?
The primary disadvantage is that you have to remember to make sure that you actually do intern() all of the strings that you'r...
How can I return two values from a function in Python?
...You can also use parenthesis like return (i, card), but tuples are created by comma, so parens are not mandatory. But you can use parens to make your code more readable or to split the tuple over multiple lines. The same applies to line my_i, my_card = select_choice().
If you want to return more th...
How is Racket different from Scheme?
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@Zorf It can easily be changed by overloading #%app, though: #lang racket (require (rename-in racket [#%app old])) (define-syntax #%app (syntax-rules () [(_) '()] [(_ . rest) (old . rest)])) (null? ()) ;; => #t
– Suzanne Dupéron
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Creating functions in a loop
...hen called after the end of the loop, i will be set to 2).
Easily fixed by forcing early binding: change def f(): to def f(i=i): like this:
def f(i=i):
return i
Default values (the right-hand i in i=i is a default value for argument name i, which is the left-hand i in i=i) are looked up at...
Why is the .bss segment required?
...The .bss segment is an optimization. The entire .bss segment is described by a single number, probably 4 bytes or 8 bytes, that gives its size in the running process, whereas the .data section is as big as the sum of sizes of the initialized variables. Thus, the .bss makes the executables smaller ...
Algorithm to find Largest prime factor of a number
...ding 1 each time, you can iterate separately for d=2 and then increment it by 1 and then from d=3 onwards you can increment by 2. so it will decrease the number of iterations... :)
– tailor_raj
Nov 19 '13 at 9:13
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