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Difference between `set`, `setq`, and `setf` in Common Lisp?
...t the SET function.
What is now written as:
(setf (symbol-value '*foo*) 42)
was written as:
(set (quote *foo*) 42)
which was eventually abbreviavated to SETQ (SET Quoted):
(setq *foo* 42)
Then lexical variables happened, and SETQ came to be used for assignment to them too -- so it was no l...
How to concatenate strings in twig
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edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Oct 9 '11 at 16:33
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Add a prefix string to beginning of each line
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edited Oct 25 '18 at 22:35
PhysicalChemist
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answered...
What is the difference between “screen” and “only screen” in media queries?
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Let's break down your examples one by one.
@media (max-width:632px)
This one is saying for a window with a max-width of 632px that you want to apply these styles. At that size you would be talking about anything smaller than a desktop screen in most cases.
@media screen and (max-widt...
Why do I get access denied to data folder when using adb?
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janot
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answered Jun 25 '09 at 12:50
Reto MeierReto Meier
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Bash command to sum a column of numbers [duplicate]
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edited Nov 9 '12 at 18:14
answered Jun 22 '10 at 19:47
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How do you do block comments in YAML?
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2069
YAML supports inline comments, but does not support block comments.
From Wikipedia:
Comm...
How can I get the iOS 7 default blue color programmatically?
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Use self.view.tintColor from a view controller, or self.tintColor from a UIView subclass.
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Find MongoDB records where array field is not empty
...lution:
ME.find({ pictures: { $exists: true, $ne: [] } })
Since MongoDB 2.6 release, you can compare with the operator $gt but could lead to unexpected results (you can find a detailled explanation in this answer):
ME.find({ pictures: { $gt: [] } })
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