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How can I read a whole file into a string variable
... Show us how to convert it then... The question doesn't ask for a byte array.
– Kyle Bridenstine
Sep 10 '19 at 16:24
...
A variable modified inside a while loop is not remembered
...]};++i)) { line=${arr[i]};
...
}
Variable $lines can be converted to an array without starting a new sub-shell. The characters \ and n has to be converted to some character (e.g. a real new line character) and use the IFS (Internal Field Separator) variable to split the string into array elements...
Random float number generation
...resented in N3551 (see it live) :
#include <algorithm>
#include <array>
#include <iostream>
#include <random>
std::default_random_engine & global_urng( )
{
static std::default_random_engine u{};
return u ;
}
void randomize( )
{
static std::random_device rd{...
C++ STL Vectors: Get iterator from index?
...g arithmetics makes swapping container types a lot easier. Even works on c-arrays afaik, just like std::begin and std::end.
– Zoomulator
May 2 '12 at 14:50
...
Why does auto a=1; compile in C?
...sor B, where there were no base types: everything was int, pointer to int, array of int.(*) Declarations would be either auto or extrn [sic]. C inherited the "everything is int" as a default rule, so you could declare integers with
auto a;
extern b;
static c;
ISO C got rid of this, but many compi...
Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...ion before that states:
If the value of argc is greater than zero, the array members argv[0] through argv[argc-1] inclusive shall contain pointers to strings, which are given implementation-defined values by the host environment prior to program startup.
This is unchanged from C99, the previou...
Git log to get commits only for a specific branch
...Do fewer allocations for simple default values.
| |
| | Don't allocate arrays when we are only assigning a single array key
| | value.
| |
* | commit c3f45e811e4b49fe27624b57c3eb8f4721a4323b
|\ \ Merge: 10e5734 43178fd
| |/ Author: Mark Story <mark@mark-story.com>
|/| Date: Mon...
Looping through the content of a file in Bash
...ld look something like read -r X <&3.
Reading a whole file into an array (Bash versions earlier to 4)
while read -r line; do
my_array+=("$line")
done < my_file
Center a map in d3 given a geoJSON object
...d, sets the projection’s center to the specified location, a two-element array of longitude and latitude in degrees and returns the projection. If center is not specified, returns the current center which defaults to ⟨0°,0°⟩.
There is also the translation, given in pixels - where the proje...
How to use PHP OPCache?
...our functions which you can use:
opcache_get_configuration():
Returns an array containing the currently used configuration OpCache uses. This includes all ini settings as well as version information and blacklisted files.
var_dump(opcache_get_configuration());
opcache_get_status():
This will r...