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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?
...rations for the code in class.cpp by including class.h. It only needs to know what these functions or variables look like (which is what a declaration gives you). So it compiles your main.cpp file into some object file (call it main.obj). Similarly, class.cpp is compiled into a class.obj file. T...
How to extract the decision rules from scikit-learn decision-tree?
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@Daniele, do you know how the classes are ordered? I would guess alphanumeric, but I haven't found confirmation anywhere.
– IanS
Sep 4 '15 at 8:27
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What does java:comp/env/ do?
...ode I found out that the simple property useNaming="false" did the trick!! Now Tomcat resolves names java:/liferay instead of java:comp/env/liferay
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Git rebase: conflicts keep blocking progress
... just skip the commit and the rebase succeed.
$ git rebase --skip
HEAD is now at 7313eb3 master
Word of caution: Please note that git rebase --skip will completely drop the commit that git tried to rebase. In our case, this should be okay since git is complaining this is an empty commit. If you...
Using Rails serialize to save hash to database
...PDATED:
Exact implementation will depend on your database, but PostgreSQL now has json and jsonb columns which can natively store your hash/object data and allow you to query against the JSON with ActiveRecord!
change your migration and you're done.
class Migration0001
def change
add_column...
user authentication libraries for node.js?
...ull,false,{ message:'Incorrect username.' }) it's terrible since we don't know what all those parameters are.
– eloone
Sep 21 '14 at 20:15
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Logical operator in a handlebars.js {{#if}} conditional
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BOOM ! Awesome, now I can do real condition inside my partial thanks !
– Tancrede Chazallet
Apr 3 '14 at 15:58
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Symfony 2 EntityManager injection in service
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Update to my own solution. The proper way now should be to use Entities and Repositories. Entity Manager is already naturally injected into a repository. You can see an example here: youtu.be/AHVtOJDTx0M
– Robert Saylor
Oct 1 '1...
How do I lowercase a string in Python?
...icode_literal.lower()
u'\u043a\u0438\u043b\u043e\u043c\u0435\u0442\u0440'
Now if we only have it in the form of a str, we need to convert it to unicode. Python's Unicode type is a universal encoding format that has many advantages relative to most other encodings. We can either use the unicode cons...
Why should you use an ORM? [closed]
...aking data access more abstract and portable. ORM implementation classes know how to write vendor-specific SQL, so you don't have to.
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