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added 114 characters in body

edited Nov 7, 2019 at 7:41

Ruby, 4444 41 bytes

->w,h{(1...w*h).map{|x|[x%w<1|x|[x,x+=x%w<1?x-w+1w:x,x+1]1]}}

1-based solution

->w,h{(1...w*h).map{|x|[x%w<1?x-w+1:x,x+1]}}

1-based solution

->w,h{(1...w*h).map{|x|[x,x+=x%w<1?w:1]}}

1-based solution

answered Nov 7, 2019 at 6:55

->w,h{(1...w*h).map{|x|[x%w<1?x-w+1:x,x+1]}}

1-based solution