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Why is $$ returning the same id as the parent process?
...d with BASHPID.
~ $ echo $$
17601
~ $ ( echo $$; echo $BASHPID )
17601
17634
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How can I print the contents of a hash in Perl?
...
Data::Dumper is your friend.
use Data::Dumper;
my %hash = ('abc' => 123, 'def' => [4,5,6]);
print Dumper(\%hash);
will output
$VAR1 = {
'def' => [
4,
5,
6
],
'abc' => 123
};...
Linq to Objects: does GroupBy preserve order of elements?
...
Manfred Radlwimmer
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answered Sep 21 '09 at 1:25
Konstantin SpirinKons...
SQL variable to hold list of integers
...
232
Table variable
declare @listOfIDs table (id int);
insert @listOfIDs(id) values(1),(2),(3); ...
Format numbers to strings in Python
...
Starting with Python 3.6, formatting in Python can be done using formatted string literals or f-strings:
hours, minutes, seconds = 6, 56, 33
f'{hours:02}:{minutes:02}:{seconds:02} {"pm" if hours > 12 else "am"}'
or the str.format function s...
Is there a difference between foo(void) and foo() in C++ or C?
...
321
In C:
void foo() means "a function foo taking an unspecified number of arguments of unspec...
Difference: std::runtime_error vs std::exception()
... design.
Update: Portability Linux vs Windows
As Loki Astari and unixman83 noted in their answer and comments below, the constructor of the exception class does not take any arguments according to C++ standard. Microsoft C++ has a constructor taking arguments in the exception class, but this is no...
Declaring and initializing variables within Java switches
...
Switch statements are odd in terms of scoping, basically. From section 6.3 of the JLS:
The scope of a local variable declaration in a block (§14.4) is the rest of the block in which the declaration appears, starting with its own initializer and including any further declarators to the right i...
“Server” vs “Data Source” in connection string
...
KyleMit
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answered Feb 22 '13 at 13:48
Damien_The_UnbelieverDamien_The...