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When to create a new app (with startapp) in Django?
I've googled around for this, but I still have trouble relating to what Django defines as "apps".
7 Answers
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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
... such that certain numbers are "pooled", and it returns the same instance for values smaller than 128.
From the java 1.6 source code, line 621:
public static Integer valueOf(int i) {
if(i >= -128 && i <= IntegerCache.high)
return IntegerCache.cache[i + 128];
else
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Convert timedelta to total seconds
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Use timedelta.total_seconds().
>>> import datetime
>>> datetime.timedelta(seconds=24*60*60).total_seconds()
86400.0
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How to check if one of the following items is in a list?
I'm trying to find a short way to see if any of the following items is in a list, but my first attempt does not work. Besides writing a function to accomplish this, is the any short way to check if one of multiple items is in a list.
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JMS Topic vs Queues
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Any idea how does the load balancing work for the Queues in JMS or WSO2 MB ?
– Kulasangar
Apr 18 '16 at 16:36
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How can I add a help method to a shell script?
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here's an example for bash:
usage="$(basename "$0") [-h] [-s n] -- program to calculate the answer to life, the universe and everything
where:
-h show this help text
-s set the seed value (default: 42)"
seed=42
while getopts ':hs:' ...
rails 3 validation on uniqueness on multiple attributes
... I would have written:
validates_uniqueness_of :zipcode, :scope => :recorded_at
In Rails 3:
validates :zipcode, :uniqueness => {:scope => :recorded_at}
For multiple attributes:
validates :zipcode, :uniqueness => {:scope => [:recorded_at, :something_else]}
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The Guava library: What are its most useful and/or hidden features? [closed]
...uava API and the new collection types it provides( Multimap and BiMap for example appear useful) and I am thinking of including the library in the project(s) I work on.
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Android screen size HDPI, LDPI, MDPI [duplicate]
... fit in all screen sizes. I have three folders, hdpi , ldpi and mdpi for drawables, but in the emulator there isn't any referense to what resolution hdpi is and what mdpi and ldpi are.
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How do I get the directory that a program is running from?
Is there a platform-agnostic and filesystem-agnostic method to obtain the full path of the directory from where a program is running using C/C++? Not to be confused with the current working directory. (Please don't suggest libraries unless they're standard ones like clib or STL.)
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