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Easy way to prevent Heroku idling?
...nothing else, use a cron job to ping your site, and disable the check for known low-use periods (ie, overnight) to ensure Heroku doesn't do away with the free tier for everyone else.
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Pickle or json?
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cPickle's latest protocol is now faster than JSON. The up-voted comment about JSON being faster is outdated by a few years. stackoverflow.com/a/39607169/1007353
– JDiMatteo
Sep 22 '16 at 1:34
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How can I drop all the tables in a PostgreSQL database?
...njection possibility (and does this really fix one if there is)? [I don't know if Postgres is foolish enough to allow table names to make that possible] If there is, you should really change your comment to an edit in the answer (explaining why in the edit comments).
– Auspex
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Where do I find old versions of Android NDK? [closed]
Does anyone know where I can find older versions of the Android NDK? Our code doesn't build with r6. Surely there must be archived versions somewhere.
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How to version control a record in a database
...e change in a second (i.e. do not put RevisionDate into the primary key).
Now, every time you update FOO, just before you do the update you insert the old values into FOO_HISTORY. You do this at some fundamental level in your design so that programmers can't accidentally miss this step.
If you wa...
How can I see what I am about to push with git?
...rrors after. You've just wasted time and bandwidth uploading data that you now have to re-upload. This seems like strange behavior.
– zeusstl
Jan 19 '15 at 7:04
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psql: FATAL: Peer authentication failed for user “dev”
... cipher: ECDHE-RSA-AES256-GCM-SHA384, bits: 256, compression: off) You are now connected to database "glossary" as user "john" on host "localhost" at port "5432". it worked.
– look
Dec 4 '16 at 2:26
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How to implement OnFragmentInteractionListener
...ate for API 23: 8/31/2015
Overrided method onAttach(Activity activity) is now deprecated in android.app.Fragment, code should be upgraded to onAttach(Context context)
@Override
public void onAttach(Context context) {
super.onAttach(context);
}
@Override
public void onStart() {
super.onSt...
Deep copy of a dict in python
... my_copy = copy.copy(my_dict)
my_deepcopy = copy.deepcopy(my_dict)
Now if you change
my_dict['a'][2] = 7
and do
print("my_copy a[2]: ",my_copy['a'][2],",whereas my_deepcopy a[2]: ", my_deepcopy['a'][2])
you get
>> my_copy a[2]: 7 ,whereas my_deepcopy a[2]: 3
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Install autoreconf on OS X v10.7 (Lion)?
...ed autoconf with the following command and autoreconf is in the right PATH now: brew reinstall autoconf
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