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Rename a dictionary key
....pop(old_key)
For an OrderedDict, I think you must build an entirely new one using a comprehension.
>>> OrderedDict(zip('123', 'abc'))
OrderedDict([('1', 'a'), ('2', 'b'), ('3', 'c')])
>>> oldkey, newkey = '2', 'potato'
>>> OrderedDict((newkey if k == oldkey else k, v...
iOS 7 - Failing to instantiate default view controller
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Create a new Storyboard in your project, name it something like Main_iPhoneV2 (or iPadV2 depending on your original storyboard style)
Open the broken storyboard, click anywhere in the white area and press command-a, then command-c (select all and copy)
Open your new storyboard and press command-v...
How to prevent text in a table cell from wrapping
Does anyone know how I can prevent the text in a table cell from wrapping? This is for the header of a table, and the heading is a lot longer than the data under it, but I need it to display on only one line. It is okay if the column is very wide.
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How to open a new window on form submit
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onclick may not be the best event to attach that action to. Anytime anyone clicks anywhere in the form, it will open the window.
<form action="..." ...
onsubmit="window.open('google.html', '_blank', 'scrollbars=no,menubar=no,height=600,width=800,resizable=yes,toolbar=no,status=no');retur...
Command line to remove an environment variable from the OS level configuration
...ontrol\Session Manager\Environment" /F /V JUNK, and confirm that value is gone from registry. I open new cmd and type echo %JUNK% and still get Hello. Search of registry show no presence of 'JUNK'. Please don't tell me you need a reboot!
– caasjj
Apr 5 '16 a...
Insert into a MySQL table or update if exists
... results in 2 when successfully updating (on duplicate key) single row? Anyone else had this result? (The data is updated correctly: meaning only 1 row is updated)
– Dimitry K
Feb 20 '14 at 15:17
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Listing all permutations of a string/integer
...ame logic)
In human language:
In short:
The permutation of 1 element is one element.
The permutation of a set of elements is a list each of the elements, concatenated with every permutation of the other elements.
Example:
If the set just has one element -->
return it.
perm(a) -> a
If the s...
What is Scala's yield?
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Right. If you just have a simple map -- one generator with no if -- I'd certainly say calling map is more readable. If you have a several generators depending on each other, and/or filters, you may prefer a for expression.
– Alexey Romanov
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What is the difference between setUp() and setUpClass() in Python unittest?
...Class() in the Python unittest framework? Why would setup be handled in one method over the other?
2 Answers
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Cannot use identity column key generation with ( TABLE_PER_CLASS )
...lumn in MsSQL. It is column based. In a "table-per-class" strategy you use one table per class and each one has an ID.
Try:
@GeneratedValue(strategy = GenerationType.TABLE)
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