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NumPy or Pandas: Keeping array type as integer while having a NaN value
...t to work with float series where possible, even when the series is upcast from int to float due to inclusion of NaN values. This enables vectorised NumPy-based calculations where, otherwise, Python-level loops would be processed.
The docs do suggest : "One possibility is to use dtype=object arrays...
Force browser to clear cache
...use no-store instead. This directive is not effective in preventing caches from storing your response." But when I searched this page for "no-store", it seems nobody mentioned it. I must be misunderstanding something, what is it?
– Matt Groth
Jun 27 at 5:08
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Checking if object is empty, works with ng-show but not from controller?
... need to set properties on the object before I have actually received info from $http. if its null then I couldn't do items.available = true could I ? I was under the impression that i had to create an object
– Martin
Jul 24 '13 at 16:27
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Looping through array and removing items, without breaking for loop
... the next item in the iteration, since the indexing affects only the items from the current point to the end of the Array, and the next item in the iteration is lower than the current point.
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How do I make HttpURLConnection use a proxy?
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This is fairly easy to answer from the internet. Set system properties http.proxyHost and http.proxyPort. You can do this with System.setProperty(), or from the command line with the -D syntax.
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Meaning of Git checkout double dashes
...changed branches instead. The -- separates the tree you want to check out from the files you want to check out.
git checkout -- master
It also helps us if some freako added a file named -f to our repository:
git checkout -f # wrong
git checkout -- -f # right
This is documented in git-c...
GCM with PHP (Google Cloud Messaging)
...unction sendPushNotification($data, $ids) {
// Insert real GCM API key from the Google APIs Console
// https://code.google.com/apis/console/
$apiKey = 'abc';
// Set POST request body
$post = array(
'registration_ids' => $ids,
'...
What requests do browsers' “F5” and “Ctrl + F5” refreshes generate?
...the same page even if the content is changed, because it may load the page from cache. But Ctrl-F5 forces a cache refresh, and will guarantee that if the content is changed, you will get the new content.
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Display image as grayscale using matplotlib
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The following code will load an image from a file image.png and will display it as grayscale.
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
fname = 'image.png'
image = Image.open(fname).convert("L")
arr = np.asarray(image)
plt.imshow(...
How to find my Subversion server version number?
...t will say something like:
"Powered by Subversion version 1.5.2 (r32768)."
From the command line: <insert curl, grep oneliner here>
If not displayed, view source of the page
<svn version="1.6.13 (r1002816)" href="http://subversion.tigris.org/">
Now for the subversion CLIENT:
svn -...