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How to keep the spaces at the end and/or at the beginning of a String?
...hich means that you're relying on your xml string being html parsed (it is by default when used in text views). See w3schools.com/html/html_entities.asp
– greg7gkb
Oct 31 '14 at 21:00
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android:drawableLeft margin and/or padding
...ht to force the text and drawable inward towards the center of the button. By adjusting the left and right padding separately you can make very detailed adjustments to the layout.
Here's an example button that uses padding to push the text and icon closer together than they would be by default:
&l...
Recursive search and replace in text files on Mac and Linux
...One exception is when the maximal number of command-line arguments allowed by the OS is breached; in that case find will run more than one instance.)
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What is the recommended way to delete a large number of items from DynamoDB?
...ed; I can imagine advanced operations like these might get added over time by the AWS team (they have a history of starting with a limited feature set first and evaluate extensions based on customer feedback), but here is what you should do to avoid the cost of a full scan at least:
Use Query rath...
What's the difference between String(value) vs value.toString()
...ng function
//OR
"hello " + obj.toString(); //calling toString directly
By the way if you want to treat this object as a number it should has a .valueOf() function defined in it.
what if we have both in one object?
if we want to treat this object as a string => use .toString()
i...
Checking to see if a DateTime variable has had a value assigned
... which case at compile-time you can tell that it isn't definitely assigned by trying to read from it :)
I suspect you really want Nullable<DateTime> (or DateTime? with the C# syntactic sugar) - make it null to start with and then assign a normal DateTime value (which will be converted appropr...
How to make Java honor the DNS Caching Timeout?
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Per Byron's answer, you can't set networkaddress.cache.ttl or networkaddress.cache.negative.ttl as System Properties by using the -D flag or calling System.setProperty because these are not System properties - they are Security p...
What is the Scala annotation to ensure a tail recursive function is optimized?
...ler will optimise.
You will then get a warning if they are not optimised by the compiler.
In Scala 2.7 or earlier, you will need to rely on manual testing, or inspection of the bytecode, to work out whether a method has been optimised.
Example:
you could add a @tailrec annotation so t...
How to execute file I'm editing in Vi(m)
...output to a split window. Use :copen to open up the "error list" produced by running :make.in its own window. Unfortunately, to get the output to be formatted properly, some finagling of the errorformat option is necessary. Otherwise output will be presumed to be of the format gcc puts out.
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Very large matrices using Python and NumPy
...ry fast; my 5 year old laptop can crunch through data doing SQL-like GROUP BY aggregation at 1,000,000 rows/second. Not bad for a Python-based solution!
Accessing the data as a NumPy recarray again is as simple as:
data = table[row_from:row_to]
The HDF library takes care of reading in the releva...