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Difference between this and self in self-type annotations?
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182
All three forms are valid, and have the effect that B is assumed as the type of this in class A...
Getting the count of unique values in a column in bash
... until further notice.Paused until further notice.
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how do you filter pandas dataframes by multiple columns
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edited Feb 28 '14 at 5:37
answered Feb 28 '14 at 4:40
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What is the best method of handling currency/money?
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add_column :items, :price, :decimal, :precision => 8, :scale => 2
In Rails, the :decimal type is returned as BigDecimal, which is great for price calculation.
If you insist on using integers, you will have to manually convert to and from BigDecimals everywhere, which wi...
How to check if bootstrap modal is open, so i can use jquery validate
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To avoid the race condition @GregPettit mentions, one can use:
($("element").data('bs.modal') ...
Are tuples more efficient than lists in Python?
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8 Answers
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XML Validation with XSD in Visual Studio IDE
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138
You'll need to associate the XML document in Visual Studio with the XSD file you have.
You sho...
How to copy data to clipboard in C#
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821
There are two classes that lives in different assemblies and different namespaces.
WinForms:...
How do I set a column value to NULL in SQL Server Management Studio?
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edited Dec 31 '13 at 21:18
brutzen
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answered Jan 14 '09 at 21:02
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How can I define a composite primary key in SQL?
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edited Jul 12 '09 at 15:48
answered Jul 10 '09 at 15:46
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