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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...then substituted into the replacement string:
EVALUATOR(mine, VARIABLE)
Now the macro EVALUATOR is discovered, and the arguments are isolated as 'mine' and 'VARIABLE'; the latter is then fully expanded to '3', and substituted into the replacement string:
PASTER(mine, 3)
The operation of this i...
What is Bootstrap?
...om their website would make more sense simply because it's written in Bold now.
– Mihaela
Mar 20 '15 at 14:11
...
How can I declare optional function parameters in Javascript? [duplicate]
...
With ES6: This is now part of the language:
function myFunc(a, b = 0) {
// function body
}
Please keep in mind that ES6 checks the values against undefined and not against truthy-ness (so only real undefined values get the default value ...
Long-held, incorrect programming assumptions [closed]
... that I was behind the curve on the things that all programmers must just know intuitively.
I've realized over time that I'm effectively comparing my knowledge to the collective knowledge of many people, not a single individual and that is a pretty high bar for anyone. Most programmers in the real...
Python Logging (function name, file name, line number) using a single file
...debug('your message')
Example output from a script I'm working on right now:
[invRegex.py:150 - handleRange() ] ['[A-Z]']
[invRegex.py:155 - handleRepetition() ] [[<__main__.CharacterRangeEmitter object at 0x10ba03050>, '{', '1', '}']]
[invRegex.py:197 - handleMacro()...
How does this print “hello world”?
...g the number with the mask 31₁₀ = 11111₂ in the sentence l & 31
Now the code maps the 5-bit value to its corresponding 7-bit ascii character. This is the tricky part, check the binary representations for the lowercase
alphabet letters in the following table:
ascii | ascii | ...
jQuery: Return data after ajax call success [duplicate]
...#test-arrow_functions
UPDATE (2017)
There is an even newer syntax right now called async functions with a new await keyword that instead of this code:
functionReturningPromise()
.then(data => console.log('Data:', data))
.catch(error => console.log('Error:', error));
lets you writ...
Why always ./configure; make; make install; as 3 separate steps?
...o make install because only root can copy files to /usr and /usr/local.
Now you see that each step is a pre-requirement for next step. Each step is a preparation to make things work in a problemless flow. Distros use this metaphor to build packages (like RPM, deb, etc.).
Here you'll see that ea...
C++ performance challenge: integer to std::string conversion
...e important thing to do is to minimize the use of std::string. (Ironic, I know.) In Visual Studio, for example, most calls to methods of std::string are not inlined, even if you specify /Ob2 in compiler options. So even something as trivial as a call to std::string::clear(), which you might expect t...
jQuery if checkbox is checked
...:checked')) {
// Do something...
alert('You can rock now...');
};
});
});
</script>
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