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What are all the uses of an underscore in Scala?
...K[_],T](a: K[T])
Ignored variables
val _ = 5
Ignored parameters
List(1, 2, 3) foreach { _ => println("Hi") }
Ignored names of self types
trait MySeq { _: Seq[_] => }
Wildcard patterns
Some(5) match { case Some(_) => println("Yes") }
Wildcard patterns in interpolations
"abc" m...
Which characters need to be escaped when using Bash?
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291
There are two easy and safe rules which work not only in sh but also bash.
1. Put the whole str...
How can I get file extensions with JavaScript?
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Update value of a nested dictionary of varying depth
I'm looking for a way to update dict dictionary1 with the contents of dict update wihout overwriting levelA
24 Answers
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Extract value of attribute node via XPath
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//Parent[@id='1']/Children/child/@name
Your original child[@name] means an element child which has an attribute name. You want child/@name.
share
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Best way to parseDouble with comma as decimal separator?
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10 Answers
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How to initialize a two-dimensional array in Python?
... \
for i in range (0, 10): \
new = [] \ can be replaced } this too
for j in range (0, 10): } with a list /
new.append(foo) / comprehension /
twod_li...
What is the best Battleship AI?
... games per match. Doing 50 games is just flipping a coin. I needed to do 1000 games to get any reasonable distinction between test algorithms.
Download Dreadnought 1.2.
Strategies:
keep track of all possible positions for ships that have >0 hits. The list never gets bigger than ~30K so it ...
How to determine whether a Pandas Column contains a particular value
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199
in of a Series checks whether the value is in the index:
In [11]: s = pd.Series(list('abc'))
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