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What is the difference between exit and return? [duplicate]
...hing
at assembly (only important parts):
main:
movl $0, %eax /* setting return value */
ret /* return from main */
and
main:
subq $8, %rsp /* reserving some space */
movl $0, %edi /* setting return value */
call exit /* calling exit...
Does reading an entire file leave the file handle open?
...file.__exit__(), which is "automatically" called in a with context manager setting, the only other way that file.close() is automatically called (that is, other than explicitly calling it yourself,) is via file.__del__(). This leads us to the question of when does __del__() get called?
A correc...
Is 1.0 a valid output from std::generate_canonical?
...numbers would lie between zero and one, without 1 , i.e. they are numbers from the half-open interval [0,1). The documention on cppreference.com of std::generate_canonical confirms this.
...
How to work with complex numbers in C?
... The expression (complex float) { r, i } can also be used to set the separate parts of the number and independently (allowing the real part to be INF while the imaginary part is NAN, for instance). That avoids the GCC-specific keyword, though I'm not sure if it actually is portable.
...
Automating “enter” keypresses for bash script generating ssh keys
...ewlines than one of the answers you claim don't work (and that's on the subset of platforms where echo -e emits something other than -e at all, which is not everywhere ssh-keygen is available).
– Charles Duffy
Jul 23 '18 at 18:07
...
How to edit log message already committed in Subversion?
...log message by
passing the --revprop switch to svn
propedit or svn propset, like either
one of these:
$svn propedit -r N --revprop svn:log URL
$svn propset -r N --revprop svn:log "new log message" URL
where N
is the revision number whose log
message you wish to change, and URL is
...
How to pad zeroes to a string?
What is a Pythonic way to pad a numeric string with zeroes to the left, i.e. so the numeric string has a specific length?
1...
How do I create a multiline Python string with inline variables?
...and in pre-Python3.6 you can get the same effect just by doing this (extra set of parenthesis and using + to concatenate): stackoverflow.com/a/54564926/4561887
– Gabriel Staples
Feb 7 '19 at 1:23
...
Split a vector into chunks in R
...
[1] 4 5 6
$`3`
[1] 7 8 9 10
Running a couple of timings using these settings:
set.seed(42)
x <- rnorm(1:1e7)
n <- 3
Then we have the following results:
> system.time(chunk(x, n)) # your function
user system elapsed
29.500 0.620 30.125
> system.time(chunk.2(x, n, fo...
Fast permutation -> number -> permutation mapping algorithms
... char[] { 'a', 'b', 'c', 'd', 'e' };
char[] permuted = new char[n];
bool[] set = new bool[n];
for (int i = 0; i < n; i++)
{
int s = sequence[i];
int remainingPosition = 0;
int index;
// Find the s'th position in the permuted list that has not been set yet.
for (index = 0; in...