basics/integer_bits.rb

tests/_examples/basics/integer_bits.rb in the metorex repository.

# A subscript on an Integer reads the bits of its two's-complement form: one
# by position, a run from a position and a length, or the run a range spans.
negative = -1
p 0b101[0]
p 0b101[1]
p negative[3]
p 3[-1]
p 13[2.1]
p 0b101001101[2, 4]
p 0b101001101[1, -1]
p 0b000001[-3, 4]
p 0b101001101[2..5]
p 0b101001101[3..]
p 0b10000[..1]

begin
  p 0b111110[..3]
rescue ArgumentError => problem
  puts problem.message
end

begin
  p 1[3..Float::INFINITY]
rescue FloatDomainError => problem
  puts problem.message
end

Output:

1
0
1
0
1
3
166
8
3
41
0
The beginless range for Integer#[] results in infinity
Infinity