New posts in Function Construction

Combinations of multiple matching patterns

How to add Optional Sequence

How to inject unevaluated list of Unique into a RuleDelayed?

How to make `D` apply chain rule on user-defined symbols as it does on `Dot` and `NonCommutativeMultiply`

Identify the independent variable in an expression

How to define a function that is Listable for some but not all arguments?

Named patterns in Except

Distributing function arguments with function compositions. How to compute $(f + g^2)(x) = f(x) + g(x)^2$?

How to check the style and number of arguments like the built-in functions?

Polynomial expansion of operator