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How to convert local time string to UTC?
How do I convert a datetime string in local time to a string in UTC time ?
21 Answers
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Python class inherits object
Is there any reason for a class declaration to inherit from object ?
6 Answers
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Sequelize.js: how to use migrations and sync
I'm close to having my project ready to launch. I have big plans for after launch and the database structure is going to change -- new columns in existing tables as well as new tables, and new associations to existing and new models.
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Node.js on multi-core machines
...UT I must miss something - isn't Node.js tuned only to run on a single process and thread?
15 Answers
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Java: when to use static methods
I am wondering when to use static methods? Say if I have a class with a few getters and setters, a method or two, and I want those methods only to be invokable on an instance object of the class. Does this mean I should use a static method?
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Java Programming - Where should SQL statements be stored? [closed]
Where should an JDBC-compliant application store its SQL statements and why?
15 Answers
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When would you use a WeakHashMap or a WeakReference?
The use of weak references is something that I've never seen an implementation of so I'm trying to figure out what the use case for them is and how the implementation would work. When have you needed to use a WeakHashMap or WeakReference and how was it used?
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Is there a performance impact when calling ToList()?
When using ToList() , is there a performance impact that needs to be considered?
8 Answers
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how does multiplication differ for NumPy Matrix vs Array classes?
The numpy docs recommend using array instead of matrix for working with matrices. However, unlike octave (which I was using till recently), * doesn't perform matrix multiplication, you need to use the function matrixmultipy(). I feel this makes the code very unreadable.
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vector::at vs. vector::operator[]
I know that at() is slower than [] because of its boundary checking, which is also discussed in similar questions like C++ Vector at/[] operator speed or ::std::vector::at() vs operator[] << surprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() met...