1) why I would want to use properties instead of fields (especially when it appears I am just adding additional code You should always use properties where possible. They abstract direct access to the field (which is created for you if you don’t create one). Even if the property does nothing other than setting a … Read more
You can do this easily with a variety of Unix tools: $ cut -d’ ‘ -f1 <<< “12/12/2013 14:32” 12/12/2013 $ awk ‘{print $1}’ <<< “12/12/2013 14:32” 12/12/2013 $ sed ‘s/ .*//’ <<< “12/12/2013 14:32” 12/12/2013 $ grep -o “^\S\+” <<< “12/12/2013 14:32” 12/12/2013 $ perl -lane ‘print $F[0]’ <<< “12/12/2013 14:32” 12/12/2013
Simple answer is no, you can’t have it both ways. From .NET Docs: In C# 3.0 and later, auto-implemented properties make property-declaration more concise when no additional logic is required in the property accessors.
Unfortunately, there is no way to do what you wish. Why? In an era where we are still trying to prove that Java is not slow, storing metadata of where or how an object was constructed would have a large overhead, and since it has a very minimal range of use, it does not exist. … Read more
You can user OUTER APPLY SELECT * FROM tbl1 OUTER APPLY ( SELECT TOP 1 currency_id, SUM(taxrate) AS taxrate FROM tbl2 WHERE wuptr.currency_id = tbl1.currency_id GROUP BY tbl2.currencyid )
The Microsoft guidelines are silent about private fields, they are only concerned with publicly visible members. Common conventions are camelCase, _camelCase and even sometimes the hangover from C++/MFC m_camelCase. If you use camelCase without a prefix, your property backing fields will differ from the property name only in case, which is not a problem in … Read more
2015-06-01: Updated to reflect @JoeC’s comment about another case when handles are static. Also updated to latest JMH and re-ran on modern hardware. The conclusion stays almost the same. Please do proper benchmarking, it is arguably not that hard with JMH. Once you do that, the answer becomes obvious. It can also showcase the proper … Read more
You can alter the fields in a subclass by overriding the init method: class LoginFormWithoutNickname(LoginForm): def __init__(self, *args, **kwargs): super(LoginFormWithoutNickname, self).__init__(*args, **kwargs) self.fields.pop(‘nickname’)
For Django < 1.10: model._meta.get_field_by_name(‘location_x’)[0].verbose_name