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count (non-blank) lines-of-code in bash
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edited Sep 22 '08 at 13:37
answered Sep 22 '08 at 13:23
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“FOUNDATION_EXPORT” vs “extern”
...EXPORT compiles to extern in C, extern "C" in C++, and other things in Win32. So, it's more compatible across languages and operating systems. For many projects, this won't make any difference.
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Android Studio says “cannot resolve symbol” but project compiles
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27 Answers
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Relative frequencies / proportions with dplyr
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295
Try this:
mtcars %>%
group_by(am, gear) %>%
summarise(n = n()) %>%
mutate(freq...
textarea's rows, and cols attribute in CSS
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edited Oct 10 '12 at 14:16
answered Jan 9 '10 at 19:04
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class
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927
First, the class << foo syntax opens up foo's singleton class (eigenclass). This allows y...
How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
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402
Assuming you've used home-brew to install and upgrade Postgres, you can perform the following st...
How to draw a dotted line with css?
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Sinan ÜnürSinan Ünür
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Can I apply the required attribute to fields in HTML5?
...e attribute specified,
and has a display size of 1 (do not have SIZE=2 or more - omit it if not needed);
and if the value
of the first option element in the
select element's list of options (if
any) is the empty string (i.e. present as value=""),
and that
option element's paren...
Correct way to use get_or_create?
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362
From the documentation get_or_create:
# get_or_create() a person with similar first names.
p, ...