大约有 12,080 项符合查询结果（耗时：0.0280秒） [XML]
Redirect stderr and stdout in Bash
...one
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answered Mar 12 '09 at 9:17
dirkgentlydirkgently
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Remove grid, background color, and top and right borders from ggplot2
...
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Can you write virtual functions / methods in Java?
...ditya
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answered Dec 28 '10 at 16:19
Klaus Byskov PedersenKlaus Byskov Pedersen
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How do I deep copy a DateTime object?
...Amy B
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“unpacking” a tuple to call a matching function pointer
...h the following snippet:
template<typename Function, typename Tuple, size_t ... I>
auto call(Function f, Tuple t, std::index_sequence<I ...>)
{
return f(std::get<I>(t) ...);
}
template<typename Function, typename Tuple>
auto call(Function f, Tuple t)
{
static const...
Adding a column to a data.frame
... times
get.seq <- mapply(from, to, 1:length(from), FUN = function(x, y, z) {
len <- length(seq(from = x[1], to = y[1]))
return(rep(z, times = len))
})
# when we unlist, we get a vector
your.df$group <- unlist(get.seq)
# and append it to your original data.f...
What is a handle in C++?
...selin
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Vim: Creating parent directories on save
... answered Nov 27 '10 at 22:08
ZyXZyX
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How to create a trie in Python
...d] = _end
... return root
...
>>> make_trie('foo', 'bar', 'baz', 'barz')
{'b': {'a': {'r': {'_end_': '_end_', 'z': {'_end_': '_end_'}},
'z': {'_end_': '_end_'}}},
'f': {'o': {'o': {'_end_': '_end_'}}}}
If you're not familiar with setdefault, it simply looks up a key i...
Can virtual functions have default parameters?
...ght
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answered Aug 20 '10 at 18:17
John DiblingJohn Dibling
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