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How can I find the number of days between two Date objects in Ruby?
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10 Answers
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ALTER TABLE to add a composite primary key
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answered Jan 14 '12 at 1:24
Adrian CornishAdrian Cornish
19.9k1010 gold badges4949 silver badges7474 bronze badges
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Warning as error - How to rid these
...rors that basically should not be halting my compile in Visual Studio 2010 and should not be show stoppers, or at least I will fix them later, but I don't want the compile to just error and halt on these kinds of problems.
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How can one print a size_t variable portably using the printf family?
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12 Answers
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How to get the position of a character in Python?
...e two is what happens when the search string isn't found. find() returns -1 and index() raises ValueError.
Using find()
>>> myString = 'Position of a character'
>>> myString.find('s')
2
>>> myString.find('x')
-1
Using index()
>>> myString = 'Position of a...
Interpolating a string into a regex
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answered Sep 29 '08 at 18:53
Jonathan LonowskiJonathan Lonowski
108k3131 gold badges188188 silver badges191191 bronze badges
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Can a for loop increment/decrement by more than one?
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edited Oct 9 '12 at 23:23
answered Oct 9 '12 at 23:18
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What does ||= (or-equals) mean in Ruby?
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174
This question has been discussed so often on the Ruby mailing-lists and Ruby blogs that there ...
In Scala, what exactly does 'val a: A = _' (underscore) mean?
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144
val a: A = _ is a compile error. For example:
scala> val a: String = _
<console>:1: ...
How to debug stream().map(…) with lambda expressions?
... the elements of the stream:
List<Integer> naturals = Arrays.asList(1,2,3,4,5,6,7,8,9,10,11,12,13);
naturals.stream()
.map(n -> n * 2)
.peek(System.out::println)
.collect(Collectors.toList());
UPDATE:
I think you're getting confused because map is an intermediate operation -...