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What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
I am transitioning from Java to C++ and have some questions about the long data type. In Java, to hold an integer greater than 2 32 , you would simply write long x; . However, in C++, it seems that long is both a data type and a modifier.
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Remove useless zero digits from decimals in PHP
...966.70 + 0; // 966.7
Internally, this is equivalent to casting to float with (float)$num or floatval($num) but I find it simpler.
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mongo group query how to keep fields
...},
sex : { $first: '$sex' },
province : { $first: '$province' },
city : { $first: '$city' },
area : { $first: '$area' },
address : { $first: '$address' },
count : { $sum: 1 }
}
}
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How to do multiple arguments to map function where one remains the same in python?
... = [1, 2, 3]
import functools
map(functools.partial(add, y=2), a)
import itertools
map(add, a, itertools.repeat(2, len(a)))
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git: patch does not apply
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git apply --reject --whitespace=fix mychanges.patch worked for me.
Explanation
The --reject option will instruct git to not fail if it cannot determine how to apply a patch, but instead to apply indivdual hunks it can apply an...
Where can I get a “useful” C++ binary search algorithm?
I need a binary search algorithm that is compatible with the C++ STL containers, something like std::binary_search in the standard library's <algorithm> header, but I need it to return the iterator that points at the result, not a simple boolean telling me if the element exists.
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What is the MySQL VARCHAR max size?
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Keep in mind that MySQL has a maximum row size limit
The internal representation of a MySQL table has a maximum row size limit of 65,535 bytes, not counting BLOB and TEXT types. BLOB and TEXT columns only contribute 9 to 12 bytes toward the row size limit because their c...
Recursive sub folder search and return files in a list python
...mainfolder and build a list off a certain file type. I am having an issue with the script. Its currently set as follows
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Keep-alive header clarification
I was asked to build a site , and one of the co-developer told me That I would need to include the keep-alive header.
1 An...
Clearing all cookies with JavaScript
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function deleteAllCookies() {
var cookies = document.cookie.split(";");
for (var i = 0; i < cookies.length; i++) {
var cookie = cookies[i];
var eqPos = cookie.indexOf("=");
var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
document.cooki...