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Scala list conm>cat m>enation, ::: vs ++
...:: 2 :: Nil // a list
list1 ::: list2 // conm>cat m>enation of two lists
list match {
case head :: tail => "non-empty"
case Nil => "empty"
}
Of course, Scala evolved other collections, in an ad-hoc manner. When 2.8 came out, the collections were redesigned for maximum code reuse an...
How to use WinForms progress bar?
I want to show progress of calculations, which are performing in external library.
4 Answers
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Frequency table for a single variable
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Maybe .value_counts()?
>>> import pandas
>>> my_series = pandas.Series([1,2,2,3,3,3, "fred", 1.8, 1.8])
>>> my_series
0 1
1 2
2 2
3 3
4 3
5 3
6 fred
7 1.8...
Why can't non-default arguments follow default arguments?
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All required parameters must be placed before any default arguments. Simply because they are mandatory, whereas default arguments are not. Syntactically, it would be impossible for the interpreter to decide which values match which arguments ...
moment.js - UTC gives wrong date
Why does moment.js UTC always show the wrong date. For example from chrome's developer console:
2 Answers
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Are SVG parameters such as 'xmlns' and 'version' needed?
In about half of the svg examples I see on the internet, the code is wrapped in plain simple <svg></svg> tags.
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Swift to Objective-C header not created in Xcode 6
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Now it works.
Project must have a Product Module Name that does not include spaces.
Defines Module must be set to Yes in Build Settings, under Packaging.
Finally works. Thanks to everyone for the help :-)
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What's the difference between Applim>cat m>ion.ThreadException and AppDomain.CurrentDomain.UnhandledExcep
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Applim>cat m>ion.ThreadException is specific to Windows Forms. Winforms runs event handlers in response to messages sent to it by Windows. The Click event for example, I'm sure you know them. If such an event handler throws an exception then there's a back-stop inside the Winforms...
Notifim>cat m>ion click: activity already open
... applim>cat m>ion with notifim>cat m>ions that open a certain activity if I click them. I want that, if I click the notifim>cat m>ion and the activity is already opened, it's not started again, but just brought to front.
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Error: Jump to case label
I wrote a program which involves use of switch statements... However on compilation it shows:
4 Answers
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