: sometype informs typescript not to worry about checking if varname might be unassigned (it tells typescript that varname will definitely be assigned, even if typescript cannot infer where it is assigned). Normally typescript will check if the variable may be unassigned, and gives errors. F...
(this as any ) is just a Type Assertion that works on dev/compiling time and has no side effects on run time because it is purely a Typescript thing. It can be useful if something related to this like this[whatever] which outputs a TS error because whatever is not defined inside the ...
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baz will not be imported, because it is not in __all__. __all__ is often used as a way to specify which names should be publicly available when a module is imported using the * syntax. It is not required for a module to define __all__, but if it does not, then from <...
For more adventurous travelers, here are more questions that push the boundaries of the lens: What does “predictable”even mean? If I know English, but don’t have the cultural background to recognize the “Roses are Red” ditty, I might find the “blue” perplexing as a completion....
The special __name__ variable in Python is a string that contains the name of the current module. If the module is the main program, __name__ will be set to the string "__main__".
Perspective 2: type compatibility relationships# From this perspective, we are not concerned with values and how they flow when code is executed. Instead, we take a more static view: Source code has locations and each location has a static type. In a TypeScript-aware editor, we can see th...
Before we get started, let's be clear what we mean by performance. This isnotthe runtime performance of your code. For the most part, TypeScript is compiled to JavaScript by stripping out all the type annotations. So it cannot affect the runtime performance of your code. (If you see ...
Suppose you have two Python files: main_script.py and module_example.py. Contents of module_example.py: def say_hello(): print("Hello from module_example!") print("__name__ in module_example:", __name__) if __name__ == '__main__': print("This code is executed only when ...
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