Multiplication tables
var max = 12
var width = (max**2 -> len+1)
func fmt_row(*items) {
items.map {|s| "%*s" % (width, s) }.join
}
say fmt_row('x┃', (1..max)...)
say "#{'━' * (width - 1)}╋#{'━' * (max * width)}"
{ |i|
say fmt_row("#{i}┃", {|j| i <= j ? i*j : ''}.map(1..max)...)
} << 1..max
Output:
x┃ 1 2 3 4 5 6 7 8 9 10 11 12
━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
1┃ 1 2 3 4 5 6 7 8 9 10 11 12
2┃ 4 6 8 10 12 14 16 18 20 22 24
3┃ 9 12 15 18 21 24 27 30 33 36
4┃ 16 20 24 28 32 36 40 44 48
5┃ 25 30 35 40 45 50 55 60
6┃ 36 42 48 54 60 66 72
7┃ 49 56 63 70 77 84
8┃ 64 72 80 88 96
9┃ 81 90 99 108
10┃ 100 110 120
11┃ 121 132
12┃ 144
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