Harsh Harsh - 8 months ago 51
Ruby Question

Integer.MIN_VALUE equivalent in Ruby

Java has a constant

that holds the minimum value an Integer can hold.

Is there any equivalent code to represent the minimum Integer value in Ruby language?


Ruby automatically "upgrades" the number (FixNumb -> BigNum) to hold the value provided, but the minimal value before the upgrade is:

FIXNUM_MIN = -(2**(0.size * 8 -2))

0.size gives the number of bytes used to store the number, so we need to multiply it by 8, to get bits and substract 2 bits.

2 bits is for:

  • one bit for sign
  • one bit for marking the number as integer