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How to avoid having class data shared among instances?
...ring the variables inside the class declaration makes them "class" members and not instance members. Declaring them inside the __init__ method makes sure that a new instance of the members is created alongside every new instance of the object, which is the behavior you're looking for.
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mysql - how many columns is too many?
...o you think that perhaps it's denormalized? Does that make SO database bad and Jeff Atwood crazy?
– ChssPly76
Sep 25 '09 at 19:06
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Forward declaration of nested types/classes in C++
...s someone know why it is not possible ? It seems there is valid use cases, and this lack prevents architecture consistency in some situations.
– Maël Nison
Nov 1 '12 at 16:10
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Showing a Spring transaction in log
...work.orm.jpa=INFO
(this is the package of the your transaction manager), and also
log4j.logger.org.springframework.transaction=INFO
If INFO isn't enough, use DEBUG
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Redirect parent window from an iframe action
...edirect.html'. The frame attempting navigation of the top-level window is sandboxed, but the 'allow-top-navigation' flag is not set.
– Bjarte Aune Olsen
Mar 18 '15 at 9:09
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How can I remove a pytz timezone from a datetime object?
...t you cannot compare datetime.datetime objects where one is timezone aware and another is timezone naive.
##############################################################################
# MySQL example! where MySQL doesn't support timezones with its DATETIME type!
###################################...
endsWith in JavaScript
...th) === suffix approach is fastest on Chrome, the same on IE11 as indexOf, and only 4% slower (fergetaboutit territory) on Firefox: jsperf.com/endswith-stackoverflow/14 And faster across the board when the result is false: jsperf.com/endswith-stackoverflow-when-false Of course, with ES6 adding endsW...
SQL Server query - Selecting COUNT(*) with DISTINCT
...t's been put into production. The table has a ticket_number, program_type, and program_name and push_number along with some other columns.
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Double Iteration in List Comprehension
...y don't have much meaning to me! Suppose you have a text full of sentences and you want an array of words.
# Without list comprehension
list_of_words = []
for sentence in text:
for word in sentence:
list_of_words.append(word)
return list_of_words
I like to think of list comprehension a...
Where in a virtualenv does the custom code go?
...en using virtualenv ? For instance, if I were building a WSGI application and created a virtualenv called foobar I would start with a directory structure like:
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