Unprotect[s_1, s_2, ...] removes the attribute Protected for the symbols s_i. Unprotect["form_1", "form_2", ...] unprotects all symbols whose names textually match any of the ...

FileType["file"] gives the type of a file, typically File, Directory, or None.

 

Listable is an attribute that can be assigned to a symbol f to indicate that the function f should automatically be threaded over lists that appear as its arguments.

FileByteCount["file"] gives the number of bytes in a file.

PropertyValue[{obj, item}, name] gives the property value associated with name for item in obj.

By providing a completely extensible set of vertex and edge properties, you can make graphs represent much more than the structural information embodied in their topology. ...

The symbolic language paradigm of Mathematica takes the concept of variables and functions to a new level. In Mathematica a variable can not only stand for a value, but can ...

Mathematica provides a large number of options for cells. All of these options can be accessed through the Option Inspector menu item in the front end. They can be set either ...

Mathematica provides a general mechanism for specifying constraints on patterns. All you need to do is to put /;condition at the end of a pattern to signify that it applies ...