[Python-ideas] Quick idea: defining variables from functions that take the variable name

MRAB python at mrabarnett.plus.com
Tue May 31 09:33:09 EDT 2016

On 2016-05-31 09:56, Stephen J. Turnbull wrote:

> It give me no clue what it's supposed to mean.  In math the forward
> arrow is often used to name a function type (including the domain
> preceding the arrow and the codomain following it in the name),
> although what the parentheses and their contents mean, I don't know.
> The codomain type is the value of TypeVar()?  What's that?  In Pascal
> and R, the reverse arrow
>     T <- TypeVar()
> is used to mean assignment (which you could read as "T receives
> TypeVar()", but the implicit argument on the RHS is a double-take for
> me in both syntaxes -- the argument to TypeVar is not optional!
FYI, in Pascal the assignment operator is ":=".

The assignment operator in APL is "←".

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