1/0 = 0 - Hackdot

Re:1/0 = 0 by PopeDotNinja on Friday August 10, 2018 @05:15PM (#17736801)

Meanwhile, in Python v3.7.0...

      >>> 1 / 0
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
      ZeroDivisionError: division by zero
      >>> 0 / 0
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
      ZeroDivisionError: division by zero
      >>> 1 / 0.0
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
      ZeroDivisionError: float division by zero
      >>> 0.0 / 0.0
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
      ZeroDivisionError: float division by zero

Meanwhile, in Elixir v1.7.1...

      iex(1)> 1 / 0
      ** (ArithmeticError) bad argument in arithmetic expression: 1 / 0
          :erlang./(1, 0)
      iex(1)> 0 / 0
      ** (ArithmeticError) bad argument in arithmetic expression: 0 / 0
          :erlang./(0, 0)
      iex(1)> 1.0 / 0.0
      ** (ArithmeticError) bad argument in arithmetic expression: 1.0 / 0.0
          :erlang./(1.0, 0.0)
      iex(1)> 0.0 / 0.0
      ** (ArithmeticError) bad argument in arithmetic expression: 0.0 / 0.0
          :erlang./(0.0, 0.0)

Meanwhile, in Ruby v2.5.1...

      irb(main):001:0> 1 / 0
      Traceback (most recent call last):
              3: from /Users/mpope/.rbenv/versions/2.5.1/bin/irb:11:in `<main>'
              2: from (irb):1
              1: from (irb):1:in `/'
      ZeroDivisionError (divided by 0)
      irb(main):002:0> 0 / 0
      Traceback (most recent call last):
              3: from /Users/mpope/.rbenv/versions/2.5.1/bin/irb:11:in `<main>'
              2: from (irb):2
              1: from (irb):2:in `/'
      ZeroDivisionError (divided by 0)
      irb(main):003:0> 1 / 0.0
      => Infinity
      irb(main):004:0> 0.0 / 0.0
      => NaN

Meanwhile, in PHP v7.0.8...

      > echo 1 / 0;
      >
      INF
      Division by zero :1
      > echo 0 / 0;
      >
      NAN
      Division by zero :1
      > echo 1 / 0.0;
      >
      INF
      Division by zero :1
      > echo 0.0 / 0.0;
      >
      NAN
      Division by zero :1

Meanwhile, in Node v10.7.0...

      Infinity
      > 1 / 0
      Infinity
      > 0 / 0
      NaN
      > 1 / 0.0
      Infinity
      > 0 / 0.0
      NaN

[ Parent | on HN ]

Re:1/0 = 0 by lisael on Friday August 10, 2018 @08:23PM (#17737604)

Meanwhile, in Python...

  In [1]: 255 + 1 is 256
  Out[1]: True
  In [2]: 256 + 1 is 257
  Out[2]: False

Every language has its inconsistencies, when it comes to math, because they run on real-world computers. All these are "slow" interpreted languages that allow runtime failures and don't use plain machine integers. Just a different trade-off.

Anyway, the Inf/NaN trick is not better than the 0 trick in my opinion, because all subsequent operations result happily in NaN. I've never seen in any NaN language a program that checks for NaN the result of each and every division.

with a NaN-kind of language, it would be:

  a = b/c
  if a == NaN:
    print "oops"

with a 0-trick language:

  a = b/c
  if a == 0 and c == 0:
    print "oops"

not THAT different, IMO :)

[ Parent | on HN ]

Re:1/0 = 0 by PopeDotNinja on Saturday August 11, 2018 @12:22AM (#17738331)

When I make a language, there will be a OuchMyHeadHurtsCommaSpaceGotSomeAspirinQuestionMarkError.

[ Parent | on HN ]