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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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[A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to… web.config issue
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I am using VS2013, MVC 5.2.2.0, Web Api 2. I have just changed the all versions from 2.0.0.0 to 3.0.0.0 of the following section of Web.config resides inside the View folder of my project.
<configSections>
<sectionGroup name="syst...
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 -...
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...
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: ...
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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Why is the gets function so dangerous that it should not be used?
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11 Answers
11
Active
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How to check if element in groovy array/hash/collection/list?
...f an array contains an element?
I thought there might be something like [1, 2, 3].includes(1) which would evaluate as true .
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