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How to concatenate two strings in C++?
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First of all, don't use char* or char[N]. Use std::string, then everything else becomes so easy!
Examples,
std::string s = "Hello";
std::string greet = s + " World"; //concatenation easy!
Easy, isn't it?
Now if you need char con...
Is there a “vim runtime log”?
...to support -V option or any command-line option.
– emallove
Feb 27 '19 at 23:07
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Target elements with multiple classes, within one rule
...t;/div>
<div class="blue-border background">!</div>
would all get a blue border and white background applied to them.
However, the accepted answer is different.
.blue-border.background {
border: 1px solid #00f;
background: #fff;
}
This applies the styles to elements that...
To find whether a column exists in data frame or not
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all(c("d", "e", "f") %in% colnames(dat))
– skan
Jul 28 '17 at 19:59
add a comment
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How to iterate over associative arrays in Bash
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This is now if assign all keys to an array: array=(${!hash[@]})
– Michael-O
Jun 6 '13 at 10:54
12
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How to use relative/absolute paths in css URLs?
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Personally, I would fix this in the .htaccess file. You should have access to that.
Define your CSS URL as such:
url(/image_dir/image.png);
In your .htacess file, put:
Options +FollowSymLinks
RewriteEngine On
RewriteRule ^ima...
What are the real-world strengths and weaknesses of the many frameworks based on backbone.js? [close
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Most of (all of?) the frameworks that you're looking at solve the same problems, but they do it in slightly different ways with slightly different goals.
I think it's fair to say that all of these projects would solve the problems i...
How to replace a whole line with sed?
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Michael J. Barber, g replace all the instance of regexp with replacement
– A-IV
Mar 28 '17 at 19:06
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Immediate Child selector in LESS
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UPDATE
Actually, the code in the original question works fine. You can just stick with the > child selector.
Found the answer.
.panel {
...
>.control {
...
}
}
Note the lack of space between ">" and "....
ActiveRecord, has_many :through, and Polymorphic Associations
...on. :source should points to the polymorphic belongs_to relationship. Then all you need to do is specify :source_type for the relationship you're trying to define.
This fix to the Widget model should allow you do exactly what you're looking for.
class Widget < ActiveRecord::Base
has_many :wid...