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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...
Understanding NSRunLoop
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211
A run loop is an abstraction that (among other things) provides a mechanism to handle system i...
How to enable C++11 in Qt Creator?
The title is pretty self-descriptive. I've downloaded Qt Creator 2.7.0, and I am trying to compile some basic C++11 code:
6...
Find which commit is currently checked out in Git
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182
You have at least 5 different ways to view the commit you currently have checked out into your w...
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...
How to do a LIKE query in Arel and Rails?
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277
This is how you perform a like query in arel:
users = User.arel_table
User.where(users[:name]...
How does Spring Data JPA differ from Hibernate for large projects?
...tp://www.springframework.org/schema/data/jpa"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
http://ww...
Python, creating objects
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Darlesson
3,28022 gold badges1616 silver badges2121 bronze badges
answered Feb 26 '13 at 4:58
WulframWulfram
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Execute Insert command and return inserted Id in Sql
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217
The following solution will work with sql server 2005 and above. You can use output to get the...