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What are all the uses of an underscore in Scala?
...](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" match {...
What is the purpose of the reader monad?
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3 Answers
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Are list-comprehensions and functional functions faster than “for loops”?
...in range(10)]`>)
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 12 (to 21)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 LIST_APPEND 2
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append new row to old csv file python
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edited Aug 14 '18 at 13:23
davidism
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Printing everything except the first field with awk
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answered Nov 16 '10 at 19:32
Ben JacksonBen Jackson
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Resolve absolute path from relative path and/or file name
... Adrien PlissonAdrien Plisson
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How to delete .orig files after merge from git repository?
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edited Jun 6 '19 at 13:05
Julian
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Capturing Groups From a Grep RegEx
... following examples and more, which may not be what you're looking for:
123_abc_d4e5
xyz123_abc_d4e5
123_abc_d4e5.xyz
xyz123_abc_d4e5.xyz
To eliminate the second and fourth examples, make your regex like this:
^[0-9]+_([a-z]+)_[0-9a-z]*
which says the string must start with one or more digits....
How to save an image locally using Python whose URL address I already know?
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13 Answers
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Linux command: How to 'find' only text files?
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edited Feb 17 '19 at 16:34
answered Dec 1 '12 at 13:27
cr...