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Can a java file have more than one class?
...can. However, there can only be one public top-level class per .java file, and public top-level classes must have the same name as the source file.
The purpose of including multiple classes in one source file is to bundle related support functionality (internal data structures, support classes, etc...
Setting direction for UISwipeGestureRecognizer
...gger 'delete' (this would have directions of the swipe gesture set to left and right)
This means that the original workaround is the way it's supposed to be used. The direction property can only be used to get the gestures recognized correctly, but not in the method performed on a successful recogn...
Email address validation using ASP.NET MVC data type attributes
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Thank you @Shittu Olugbenga! But I can't understand why this doesn't work: [DataType(DataType.EmailAddress, ErrorMessage = "Error message.")]
– Wellington Zanelli
Sep 18 '14 at 12:34
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How to import multiple .csv files at once?
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Here are some options to convert the .csv files into one data.frame using R base and some of the available packages for reading files in R.
This is slower than the options below.
# Get the files names
files = list.files(pattern="*.csv")
# First ap...
SQL Server SELECT LAST N Rows
...S OrderedDate,*
FROM Orders
) as ordlist
WHERE ordlist.EmployeeID = 5
AND ordlist.OrderedDate <= 5
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How to get a reversed list view on a list in Java?
...ith an original list that is modifiable, changes to both the original list and the view are reflected in the other.
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What does $_ mean in PowerShell?
...he current value in the pipe line, which is called $PSItem in Powershell 3 and newer.
1,2,3 | %{ write-host $_ }
or
1,2,3 | %{ write-host $PSItem }
For example in the above code the %{} block is called for every value in the array. The $_ or $PSItem variable will contain the current value...
What is cardinality in MySQL?
...ow.
Cardinality is a property which affects the ability to cluster, sort and search data. It is therefore an important measurement for the query planners in DBs, it is a heuristic which they can use to choose the best plans.
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Display a view from another controller in ASP.NET MVC
...across multiple controllers. Just add your View to the Shared subdirectory and you're good to go.
If you do return View("~/Views/Wherever/SomeDir/MyView.aspx") You can return any View you'd like.
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Is there “0b” or something similar to represent a binary number in Javascript
... is a prefix for hexadecimal numbers in Javascript. For example, 0xFF stands for the number 255.
10 Answers
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