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Python memory usage of numpy arrays
I'm using python to analyse some large files and I'm running into memory issues, so I've been using sys.getsizeof() to try and keep track of the usage, but it's behaviour with numpy arrays is bizarre. Here's an example involving a map of albedos that I'm having to open:
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Aren't promises just callbacks?
I've been developing JavaScript for a few years and I don't understand the fuss about promises at all.
10 Answers
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Scatterplot with too many points
... of the plot is a function of the number of points in an region? In other words, instead of showing individual points, I want the plot to be a "cloud", with the more the number of points in a region, the darker that region.
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How to convert numbers between hexadecimal and decimal
...alue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
or
int decValue = Convert.ToInt32(hexValue, 16);
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Convert Base64 string to an image file? [duplicate]
...a when the base64 function decodes it. Remove that data in the function before decoding the string, like so.
function base64_to_jpeg($base64_string, $output_file) {
// open the output file for writing
$ifp = fopen( $output_file, 'wb' );
// split the string on commas
// $data[ 0 ] ...
How to hide underbar in EditText
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You can set the EditText to have a custom transparent drawable or just use
android:background="@android:color/transparent"
or
android:background="@null"
or Programmatically
editText.setBackgroundResource(android.R.color.transparent);
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Python unit test with base and sub class
... so your class with common tests doesn't itself inherit from TestCase.
import unittest
class CommonTests(object):
def testCommon(self):
print 'Calling BaseTest:testCommon'
value = 5
self.assertEquals(value, 5)
class SubTest1(unittest.TestCase, CommonTests):
def te...
Declaring and initializing variables within Java switches
...pears, starting with its own initializer and including any further declarators to the right in the local variable declaration statement.
In your case, case 2 is in the same block as case 1 and appears after it, even though case 1 will never execute... so the local variable is in scope and availabl...
Useful example of a shutdown hook in Java?
...ou could do the following:
Let the shutdown hook set some AtomicBoolean (or volatile boolean) "keepRunning" to false
(Optionally, .interrupt the working threads if they wait for data in some blocking call)
Wait for the working threads (executing writeBatch in your case) to finish, by calling the T...
Using “this” with class name
... Android programming and was learning about Intents, when I saw a constructor that, to my C# trained mind, seemed funky. The call was:
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