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What’s the best way to check if a file exists in C++? (cross platform)
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It's better to go and open the file, check for failure and if all is good then do something with the file. It's even more important with security-critical code.
Details about security and race conditions:
http://www.ibm.com/developerworks/library/l-sprace.html
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Is there a method that calculates a factorial in Java?
... Not many people actually need factorials in real code. If you do, then you are probably doing some advanced maths or statistics, in which case you will already most likely be using a maths library with a specialised factorial implementation.
– mikera
J...
jquery save json data object in cookie
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$.cookie("basket-data", JSON.stringify($("#ArticlesHolder").data()));
Then to get it from the cookie:
$("#ArticlesHolder").data(JSON.parse($.cookie("basket-data")));
This relies on JSON.stringify() and JSON.parse() to serialize/deserialize your data object, for older browsers (IE<8) inclu...
pip install mysql-python fails with EnvironmentError: mysql_config not found
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If these solutions don't work for you, then you might still be needing to install python-dev: apt-get install python-dev
– Anoyz
Aug 20 '13 at 8:36
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Compiling problems: cannot find crt1.o
...s are located
$ find /usr/ -name crti*
/usr/lib/x86_64-linux-gnu/crti.o
then add this path to LIBRARY_PATH variable
$ export LIBRARY_PATH=/usr/lib/x86_64-linux-gnu:$LIBRARY_PATH
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What do all of Scala's symbolic operators mean?
...ted methods
Common methods
Syntactic sugars/composition
It is fortunate, then, that most categories are represented in the question:
-> // Automatically imported method
||= // Syntactic sugar
++= // Syntactic sugar/composition or common method
<= // Common method
_._ // Typo, th...
What is the >>>= operator in C?
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The initial value of a[0] is 10. After shifting right once, it become 5, then (rounding down) 2, then 1 and finally 0, at which point the loop ends. Thus, the loop body gets executed three times.
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Phase • Animations made easy! - Extensions - Kodular Community
...#a18ddf;
--success: #1ca551;
}
}
/* then deal with dark scheme */
@media (prefers-color-scheme: dark) {
:root {
--primary: #000000;
--secondary: #ffffff;
--tertiary: #4527a0;
--quaternary: #4527a...
How to “inverse match” with regex?
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(?!Andrea) means 'match if the next 6 characters are not "Andrea"'; if so then
\w means a "word character" - alphanumeric characters. This is equivalent to the class [a-zA-Z0-9_]
\w{6} means exactly 6 word characters.
re.IGNORECASE means that you will exclude "Andrea", "andrea", "ANDREA" ...
A...
RegEx for Javascript to allow only alphanumeric
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If you wanted to return a replaced result, then this would work:
var a = 'Test123*** TEST';
var b = a.replace(/[^a-z0-9]/gi,'');
console.log(b);
This would return:
Test123TEST
Note that the gi is necessary because it means global (not just on the first match), a...