Bruce Eckel announces he's going to write Atomic Python

Re:Bruce Eckel announces he's going to write Atomic Python by wpietri on Thursday September 03, 2015 @01:17AM (#10163444)

Is there some language where [4,6] is the output? That strikes me as serving some use case that I've never come across. Whereas having two lists and wanting to end up with one list with all the elements is a very common need.

[ Parent | on HN ]

Re:Bruce Eckel announces he's going to write Atomic Python by gknoy on Thursday September 03, 2015 @01:27AM (#10163469)

I believe it would be in Matlab, as [1, 2] + [3, 4] would be considered matrix addition, in which one adds elements in corresponding places. Numpy (as mentioned in the GP) probably does similar.

[ Parent | on HN ]

Re:Bruce Eckel announces he's going to write Atomic Python by wpietri on Thursday September 03, 2015 @02:32AM (#10163598)

Ah, ok, thanks. Right, matrix math is is the use case I was looking for.

[ Parent | on HN ]

Re:Bruce Eckel announces he's going to write Atomic Python by vessenes on Thursday September 03, 2015 @01:48AM (#10163512)

Yes, python.

   In [1]: import numpy as np

   In [2]: a = np.array([1,2])

   In [3]: b = np.array([3,4])

   In [4]: a+b

   Out[4]: array([4, 6])

[ Parent | on HN ]

Re:Bruce Eckel announces he's going to write Atomic Python by bwohlergo on Thursday September 03, 2015 @05:21AM (#10163966)

we are talking about Lists, not arrays from an unrelated library which has to be installed first. what you've done there is simply dishonest

In [1]: a = [1,2]

In [2]: b = [4,5]

In [3]: print(a+b)

Out [1, 2, 4, 5]

[ Parent | on HN ]

Re:Bruce Eckel announces he's going to write Atomic Python by Animats on Thursday September 03, 2015 @03:37AM (#10163732)

Is there some language where [4,6] is the output?

Yes. Python:

    >>> x = numpy.array([1,2])
    >>> y = numpy.array([3,4])
    >>> x + y
    array([4, 6])

For extra fun:

    >>> x + [3,4]
    array([4, 6])
    >>> [1,2] + y
    array([4, 6])

but, of course:

    >>> [1,2] + [3,4]
    [1, 2, 3, 4]

[ Parent | on HN ]

Re:Bruce Eckel announces he's going to write Atomic Python by topogios on Thursday September 03, 2015 @01:37AM (#10163490)

In R:

> a <- array(c(1,2))

> b <- array(c(3,4))

> a + b

[1] 4 6

> class(a + b)

[1] "array"

[ Parent | on HN ]