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MongoDB with redis
Can anyone give example use cases of when you would benefit from using Redis and MongoDB in conjunction with each other?
3 ...
Is it a good practice to use try-except-else in Python?
... example:
recip = float('Inf')
try:
recip = 1 / f(x)
except ZeroDivisionError:
logging.info('Infinite result')
else:
logging.info('Finite result')
Another example occurs in unittest runners:
try:
tests_run += 1
run_testcase(case)
except Exception:
tests_failed += 1
lo...
Why does changing 0.1f to 0 slow down performance by 10x?
... cvtsi2ssq %rcx, %xmm1
81d76
< subss %xmm1, %xmm0
The cvtsi2ssq one being 10 times slower indeed.
Apparently, the float version uses an XMM register loaded from memory, while the int version converts a real int value 0 to float using the cvtsi2ssq instruction, taking a lot of time. Passi...
mongodb group values by multiple fields
...ount of results.
This turns out to be very difficult to do, but it can be done though the complexity just increases with the number of items you need to match. To keep it simple we can keep this at 2 matches at most:
db.books.aggregate([
{ "$group": {
"_id": {
"addr": "$addr"...
What is the difference between Ruby 1.8 and Ruby 1.9
...t; {1=>2}.index(2)
=> 1
Action: Use Hash.key
Fixnum.to_sym Now Gone
Ruby 1.9
irb(main):001:0> 5.to_sym
NoMethodError: undefined method 'to_sym' for 5:Fixnum
Ruby 1.8.6
irb(main):001:0> 5.to_sym
=> nil
(Cont'd) Ruby 1.9
# Find an argument value by name or index.
def [](ind...
Flask vs webapp2 for Google App Engine
...es, if you'll use them.
I much prefer Werkzeug over WebOb, but after over one year porting and maintaining versions of the SDK handlers that work natively with tipfy, I realized that this is a lost cause -- to support GAE for the long term, best is to stay close to webapp/WebOb. It makes support fo...
Tying in to Django Admin's Model History
...nswered Jul 31 '09 at 0:16
T. StoneT. Stone
17.7k1414 gold badges6464 silver badges9595 bronze badges
...
git stash blunder: git stash pop and ended up with merge conflicts
...han using reset --hard because it doesn't overwrite your files (except the ones with merge problems). Thanks!
– sinelaw
Dec 18 '12 at 16:41
...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...CTION__ , __func__ , and where are they documented? How do I decide which one to use?
5 Answers
...
When do I use a dot, arrow, or double colon to refer to members of a class in C++?
...r to members of a class: a::b , a.b , and a->b . When do I use which one of these operators?
4 Answers
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