On Friday, November 24, 2017 at 8:07:07 AM UTC-8, Chris Angelico wrote:
> This is the kind of function that needs a docstring and some comments.
> What exactly is this doing? What are the "lines" of the board? What's
> the difference between "linear" and "lines"? What exactly is it
> returning?
producing documentation is an extremely difficult task for me, but i've come up
with the following:
"""
makelines(length,numrows,numcolumns) IS THE LIST OF ALL LISTS L, WITH LENGTH
length, OF COORDINATES
FROM A numrows x numcolumns MATRIX, SUCH THAT THE ENTRIES OF L ALL LIE IN A
LINE:
LET horizontal BE ALL THE APPROPRIATE-LENGTH LISTS WHOSE ENTRIES LIE IN A
HORIZONTAL LINE
LET vertical BE ALL THE APPROPRIATE-LENGTH LISTS WHOSE ENTRIES LIE IN A
VERTICAL LINE
LET downward BE ALL THE APPROPRIATE-LENGTH LISTS WHOSE ENTRIES LIE IN A
DOWNWARD-SLOPING DIAGONAL LINE
LET upward BE ALL THE APPROPRIATE-LENGTH LISTS WHOSE ENTRIES LIE IN AN
UPWARD-SLOPING DIAGONAL LINE
THEN makelines(length,numrows,numcolumns) IS THE UNION OF ALL THE
AFOREMENTIONED SETS
"""
def makelines(length,numrows,numcolumns):
horizontal = [[(i, j+k) for k in range(length)] for i in range(numrows) for
j in range(numcolumns)]
vertical = [[(i+k, j) for k in range(length)] for i in range(numrows) for j
in range(numcolumns)]
downward = [[(i+k, j+k) for k in range(length)] for i in range(numrows) for
j in range(numcolumns)]
upward = [[(i+k, j-k) for k in range(length)] for i in range(numrows) for j
in range(numcolumns)]
linear = horizontal + vertical + downward + upward
return [line for line in linear if all(i in range(6) and j in range(7) for
(i,j) in line)]
def getlines(board):
coordlines = makelines(4,6,7) ## GLOBAL
return [[board[square] for square in line] for line in coordlines
i tried to remove all the superfluous spaces from that, but lining up code
vertically is very helpful to me, so i don't think i can really dispense with
the practice
peace
stm
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