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Scala type programming resources

...programming, the computation occurs at compile time. I will try to draw parallels between programming at the value-level and programming at the type-level. Paradigms There are two main paradigms in type-level programming: "object-oriented" and "functional". Most examples linked to from here follow...
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Resolve build errors due to circular dependency amongst classes

...ember that the .cc and not the .h is the unit of compilation), you need to allocate space for object A. So, well, how much space then? Enough to store B! What's the size of B then? Enough to store A! Oops. Clearly a circular reference that you must break. You can break it by allowing the compiler ...
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SQL: deleting tables with prefix

How to delete my tables who all have the prefix myprefix_ ? 10 Answers 10 ...
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Flask-SQLAlchemy import/context issue

...: # fields here pass And then in your application setup you can call init_app: # apps.application.py from flask import Flask from apps.members.models import db app = Flask(__name__) # later on db.init_app(app) This way you can avoid cyclical imports. This pattern does not necessitate ...
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What does “hashable” mean in Python?

...y and a set member, because these data structures use the hash value internally. All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all comp...
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Combining multiple git repositories

... git pull code $ rm -rf code/code $ rm -rf code/.git $ git pull figures --allow-unrelated-histories $ rm -rf figures/figures $ rm -rf figures/.git $ git pull thesis --allow-unrelated-histories $ rm -rf thesis/thesis $ rm -rf thesis/.git Finally, you should now have what you wanted: phd |_.git...
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What does the restrict keyword mean in C++?

... A restrict-qualified pointer (or reference)... ! ...is basically a promise to the compiler that for the scope of the pointer, the target of the pointer will only be accessed through that pointer (and pointers copied from it). In C++ compilers that support it i...
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How do I get list of methods in a Python class?

... Will this produce a list of all methods in the class (including ones that are inherited from other classes), or will it only list the methods that are explicitly defined in that class? – Anderson Green Mar 10 '13 a...
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Importing modules from parent folder

...t can matter if somewhere else then the parentdir, but in one of the paths allready specified in sys.path, there is another module with the name 'mymodule'. Inserting the parentdir as the first element of the sys.path list assures that the module from parentdir will be imported instead. ...
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How to terminate a Python script

...ed by raising the SystemExit exception, so cleanup actions specified by finally clauses of try statements are honored, and it is possible to intercept the exit attempt at an outer level. The optional argument arg can be an integer giving the exit status (defaulting to zero), or another type of obj...