Numeric literals prepended with `0`

Question

Using insert, I push values to an Array as:

myarray=[22,33,44]
myarray.insert(0,02)
# => [2,22,33,44]

If do the fo

Answer 1

If the number has a zero in front of it, ruby treats it as an octal number (base 8)

You can do similar with binary/hexadecimal too

0x20 => 32 (hexadecimal)
020 => 16 (octal)
0b10 => 2 (binary)
080 => Invalid octal digit