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What is a lambda expression in C++11?
...o write something like the following, to keep the functor local:
void func2(std::vector<int>& v) {
struct {
void operator()(int) {
// do something
}
} f;
std::for_each(v.begin(), v.end(), f);
}
however this is not allowed, f cannot be passed to a template function i...
Is there a decorator to simply cache function return values?
...
207
Starting from Python 3.2 there is a built-in decorator:
@functools.lru_cache(maxsize=100, typ...
Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
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edited Dec 22 '14 at 22:36
answered Jan 19 '12 at 2:16
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...难题！
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Javascript: Round up to the next multiple of 5
I need a utility function that takes in an integer value (ranging from 2 to 5 digits in length) that rounds up to the next multiple of 5 instead of the nearest multiple of 5. Here is what I got:
...
Python requests - print entire http request (raw)?
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224
Since v1.2.3 Requests added the PreparedRequest object. As per the documentation "it contains ...
JavaScript curry: what are the practical applications?
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Andreas Grech
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answered Sep 22 '08 at 9:47
Hank GayHank Gay
...
JavaScript loop through json array?
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228
Your JSON should look like this:
var json = [{
"id" : "1",
"msg" : "hi",
"tid"...
How can I make pandas dataframe column headers all lowercase?
...e(3,0,-1), 'C':list('abc')})
>>> data
A B C
0 0 3 a
1 1 2 b
2 2 1 c
>>> data.columns = map(str.lower, data.columns)
>>> data
a b c
0 0 3 a
1 1 2 b
2 2 1 c
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