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How exactly does the callstack work?
... pointer arithmetic.
Example
#include <iostream>
int main()
{
char c = std::cin.get();
std::cout << c;
}
gcc.godbolt.org gives us
main:
pushq %rbp
movq %rsp, %rbp
subq $16, %rsp
movl std::cin, %edi
call std::basic_istream<char, std::cha...
Format date and time in a Windows batch script
...ces with zeros.
Short explanation of how substrings work:
%VARIABLE:~num_chars_to_skip,num_chars_to_keep%
So to get just the year from a date like "29.03.2018" use:
%DATE:~6,4%
^-----skip 6 characters
^---keep 4 characters
...
Custom attributes - Yea or nay?
...}
if (node.nodeType === 1) {
ret = ret.concat( getAllComments(node) );
}
} while( node = node.nextSibling );
return ret;
},
cache = [0],
expando = 'data' + +new Date(),
data = function(node)...
Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
...57
or
byte b = 100;
b /= 2.5;
System.out.println(b); // prints 40
or
char ch = '0';
ch *= 1.1;
System.out.println(ch); // prints '4'
or
char ch = 'A';
ch *= 1.5;
System.out.println(ch); // prints 'a'
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...
Best way to parse command-line parameters? [closed]
... to improve on (by using a List).
Note also that this approach allows for concatenation of multiple command line arguments - even more than two!
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static const vs #define
...space {
unsigned const seconds_per_minute = 60;
};
int main (int argc; char *argv[]) {
...
}
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What is the best way to paginate results in SQL Server
...
Still waiting on LISTAGG()/GROUP_CONCAT().
– Bacon Bits
Nov 10 '14 at 20:07
1
...
Preserving order with LINQ
... can map a source element by index to a result element
AsEnumerable
Cast
Concat
Select
ToArray
ToList
Preserves Order. Elements are filtered or added, but not re-ordered.
Distinct
Except
Intersect
OfType
Prepend (new in .net 4.7.1)
Skip
SkipWhile
Take
TakeWhile
Where
Zip (new in .net 4)
Des...
string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
... space besides empty string.
The term “white space” includes all characters that are not visible on
screen. For example, space, line break, tab and empty string are white
space characters*.
Reference : Here
For performance, IsNullOrWhiteSpace is not ideal but is
good. The meth...
Accessing last x characters of a string in Bash
I found out that with ${string:0:3} one can access the first 3 characters of a string. Is there a equivalently easy method to access the last three characters?
...