tree functions daily exercise: Table

[Duncan Booth]

Xah Lee wrote:

> oops, another error. The example should be:
> 
> Table(f,[1,2,1],[2,6,2]) returns
> [[f(1,2),f(1,4),f(1,6)],[f(2,2),f(2,4),f(2,6)]]
> 
>> Wouldn't it be more sensible just to take the iterators directly as
>> arguments, so for this example you would do:
>>
>> Table(f, range(1,3), range(2,7,2))
> 
> well yes... but this was emulation of Mathematica functions.
> (Disclaimer: Mathematica is a trademark of Wolfram Research Inc, who is
> not affliated with this project)
> 
> What you suggested is a function called Outer in Mathematica. The Table
> function is in a sense multi-dimentional version of Range, so they
> share syntax form.
> 
Ok, so, if I understand you, the definition of Table is just:

def Table(f, *lists):
    return Outer(f,
        *[range(start,end+1,step) for (start,end,step) in lists])

Is that about right?