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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
... a pointer to a double has to be explicitly signalled to scanf as distinct from a pointer to float, because what the pointer points to is what matters.
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CSS does the width include the padding?
...octype declared? When I started coding html I had this problem, and it was from not having a doctype declared. My favorite is:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1...
Regex exactly n OR m times
... @erb if you leave out ?:, the group becomes a capturing group. Aside from the regex engine remembering stuff it doesn't have to, if you have capturing groups after this one, their IDs will change. If you use your regex for substitution, you will have to adjust the replacement.
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In CMake, how can I test if the compiler is Clang?
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This is a slightly more detailed answer for cmake newbies, modified from sakra's answer. The minimum version of 3.1 seems to be important as it changes the way CMake processes the quoted "MSVC" string (according to policy CMP0054).
cmake_minimum_required(VERSION 3.1)
project(MyProject CXX)
i...
Git On Custom SSH Port
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When you want a relative path from your home directory (on any UNIX) you use this strange syntax:
ssh://[user@]host.xz[:port]/~[user]/path/to/repo
For Example, if the repo is in /home/jack/projects/jillweb on the server jill.com and you are logging in a...
Breaking up long strings on multiple lines in Ruby without stripping newlines
...y-heredoc
The indentation of the least-indented line will be
removed from each line of the content.
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Float right and position absolute doesn't work together
... With @eivers88's answer, I still need to remove 'overflow-y: auto;' from the parent element to make it work.
– angelokh
Mar 24 '14 at 0:04
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Increase number of axis ticks
...d on Daniel Krizian's comment, you can also use the pretty_breaks function from the scales library, which is imported automatically:
ggplot(dat, aes(x,y)) + geom_point() +
scale_x_continuous(breaks = scales::pretty_breaks(n = 10)) +
scale_y_continuous(breaks = scales::pretty_breaks(n = 10))
All y...
Change default timeout for mocha
...t work
// tests...
});
This is because an arrow function takes this from the scope the function appears in. Mocha will call the function with a good value for this but that value is not passed inside the arrow function. The documentation for Mocha says on this topic:
Passing arrow functio...
C++ map access discards qualifiers (const)
...ot in the map.
const mapped_type& at(const key_type& __k) const
From a reference in the function's comment, it appears that this has been suggested as a new member function in the standard library.
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