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Efficient way to remove keys with empty strings from a dict
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Python 2.X
dict((k, v) for k, v in metadata.iteritems() if v)
Python 2.7 - 3.X
{k: v for k, v in metadata.items() if v is not None}
Note that all of your keys have values. It's just that some of those values are the empty string. There's no such thing...
Why would you use an ivar?
...easily via the accessors.
Performance
Yes, this can make a difference in some cases. Some programs have constraints where they can not use any objc messaging in certain parts of the program (think realtime). In other cases, you may want to access it directly for speed. In other cases, it's because o...
Converting stream of int's to char's in java
...enient to call read(char[], int, int) to read a whole block of text at a time. Don't forget to check the return value though, to see how many characters have been read.
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getting type T from IEnumerable
is there a way to retrieve type T from IEnumerable<T> through reflection?
13 Answers
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How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
...lt it is case insensitive.
Excerpt from the link:
SELECT 1
FROM dbo.Customers
WHERE CustID = @CustID COLLATE SQL_Latin1_General_CP1_CS_AS
AND CustPassword = @CustPassword COLLATE SQL_Latin1_General_CP1_CS_AS
Or, change the columns to be case sensitive.
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Min/Max of dates in an array?
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Code is tested with IE,FF,Chrome and works properly:
var dates=[];
dates.push(new Date("2011/06/25"))
dates.push(new Date("2011/06/26"))
dates.push(new Date("2011/06/27"))
dates.push(new Date("2011/06/28"))
var maxDate=new Date(Math.max.apply(null,dates)...
Print PHP Call Stack
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this regularly makes my php run out of memory. I recommend Tobiasz' solution.
– peedee
Jul 16 '15 at 9:19
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Is it possible to embed animated GIFs in PDFs?
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I haven't tested it but apparently you can add quicktime animations to a pdf (no idea why). So the solution would be to export the animated gif to quicktime and add it to the pdf.
Here the solution that apparently works:
Open the GIF in Quicktime and save as MOV (Apparently i...
What is the combinatory logic equivalent of intuitionistic type theory?
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So I thought about it a bit more and made some progress. Here's a first stab at encoding Martin-Löf's delightfully simple (but inconsistent) Set : Set system in a combinatory style. It's not a good way to finish, but it's the easiest place to get started. The syntax o...
Is there a portable way to get the current username in Python?
Is there a portable way to get the current user's username in Python (i.e., one that works under both Linux and Windows, at least). It would work like os.getuid :
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