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Target elements with multiple classes, within one rule
...ould have elements with multiple classes, and I need to assign them within one rule, so that the same classes could be different within different containers. Say I have this in my CSS:
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How can I convert immutable.Map to mutable.Map in Scala?
...ritten to take advantage of this:
val m = collection.immutable.Map(1->"one",2->"Two")
val n = collection.mutable.Map(m.toSeq: _*)
This works because a Map can also be viewed as a sequence of Pairs.
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What's the best practice for primary keys in tables?
When designing tables, I've developed a habit of having one column that is unique and that I make the primary key. This is achieved in three ways depending on requirements:
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How do I list one filename per output line in Linux?
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Use the -1 option (note this is a "one" digit, not a lowercase letter "L"), like this:
ls -1a
First, though, make sure your ls supports -1. GNU coreutils (installed on standard Linux systems) and Solaris do; but if in doubt, use man ls or ls --help or ch...
How to recognize swipe in all 4 directions
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You need to have one UISwipeGestureRecognizer for each direction. It's a little weird because the UISwipeGestureRecognizer.direction property is an options-style bit mask, but each recognizer can only handle one direction. You can send them a...
Hibernate openSession() vs getCurrentSession()
...nSession() always opens a new session that you have to close once you are done with the operations. SessionFactory.getCurrentSession() returns a session bound to a context - you don't need to close this.
If you are using Spring or EJBs to manage transactions you can configure them to open / close s...
Entity Framework vs LINQ to SQL
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This answer is obsolete. Now Linq to SQL supports one2many mapping
– George Lanetz
Dec 29 '15 at 13:18
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Replace one substring for another string in shell script
... @Priyatham51: There's no built-in feature for that. Just replace one, then the other.
– ruakh
Jan 9 '14 at 0:05
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In bash, how does one clear the current input?
...rom the cursor to the end of the line. (It is sometimes useful to use only one of them.)
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Calculating arithmetic mean (one type of average) in Python
...-in or standard library method in Python to calculate the arithmetic mean (one type of average) of a list of numbers?
12 An...