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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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Why would one use nested classes in C++?
... Node as other people may decide to use the class and that would hinder me from updating my class as anything exposed is part of the public API and must be maintained forever. By making the class private, I not only hide the implementation I am also saying this is mine and I may change it at any tim...
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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Why is 'this' a pointer and not a reference?
...uld argue it either way. But C++ evolved gradually in response to feedback from a community of users (like most successful things). The value of backward compatibility totally overwhelms the minor advantages/disadvantages stemming from this being a reference or a pointer.
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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(...
I need to pop up and trash away a “middle” commit in my master branch. How can I do it?
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Rebase or revert are the options. Rebase will actually remove the commit from the history so it will look like that second commit never existed. This will be a problem if you've pushed the master branch out to any other repos. If you try to push after a rebase in this case, git will give you a rej...
How do I do an OR filter in a Django query?
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There is Q objects that allow to complex lookups. Example:
from django.db.models import Q
Item.objects.filter(Q(creator=owner) | Q(moderated=False))
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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,
'...
How do you rebase the current branch's changes on top of changes being merged in?
...ay. If I'm on a branch (say working ), and I want to merge in the changes from another branch (say master ), then I run the command git-merge master while on the working branch, and the changes get merged in without rebasing the history at all. If I run git-rebase master , then the changes in...
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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