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Maximum and Minimum values for ints
...mum value with -sys.maxint - 1 as shown here.
Python seamlessly switches from plain to long integers once you exceed this value. So most of the time, you won't need to know it.
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What is the difference between atomic / volatile / synchronized?
...t getNextUniqueIndex() {
return counter++;
}
It basically reads value from memory, increments it and puts back to memory. This works in single thread but nowadays, in the era of multi-core, multi-CPU, multi-level caches it won't work correctly. First of all it introduces race condition (several...
Invalid default value for 'create_date' timestamp field
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That is because of server SQL Mode - NO_ZERO_DATE.
From the reference: NO_ZERO_DATE - In strict mode, don't allow '0000-00-00' as a valid date. You can still insert zero dates with the IGNORE option. When not in strict mode, the date is accepted but a warning is generated.
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In Python, how do you convert a `datetime` object to seconds?
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Consider using: datetime.datetime.utcfromtimestamp(0) I've used this to get the 'epoch' easily. Note that epoch is not always the same on all systems.
– D. A.
Nov 5 '13 at 20:04
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Disable a method in a ViewSet, django-rest-framework
...tending ModelViewSet, why not just use whatever you need? So for example:
from rest_framework import viewsets, mixins
class SampleViewSet(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
viewsets.GenericViewSe...
Greenlet Vs. Threads
... of threads is instead appropriate. Here is a more reasonable comparison (from my reddit post in response to people citing this SO post).
import gevent
from gevent import socket as gsock
import socket as sock
import threading
from datetime import datetime
def timeit(fn, URLS):
t1 = datetim...
Favorite way to create an new IEnumerable sequence from a single value?
I usually create a sequence from a single value using array syntax, like this:
4 Answers
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Deleting elements from std::set while iterating
...ementation is buggy or there is yet another requirement that prevents this from working on deque. The STL spec is so convoluted that you can't expect all implementations to follow it, let alone your casual programmer to memorize it. STL is a monster beyond taming, and since there is no unique implem...
Sending and Receiving SMS and MMS in Android (pre Kit Kat Android 4.4)
....putExtra("address", num);
mmsIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File(fileString)));
mmsIntent.setType("image/jpeg");
startActivity(Intent.createChooser(mmsIntent, "Send"));
}
I haven't completely figured out how to do things like track the delivery of the message b...
How can you undo the last git add?
...
Remove the file from the index, but keep it versioned and left with uncommitted changes in working copy:
git reset head <file>
Reset the file to the last state from HEAD, undoing changes and removing them from the index:
git reset H...