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export abs = Math.abs

export signum = (x) ->
  | x < 0     => -1
  | x > 0     =>  1
  | otherwise =>  0

export quot = (x, y) --> ~~(x / y)

export rem = (%)

export div = (x, y) --> Math.floor x / y

export mod = (%%)

export recip = (1 /)

export pi = Math.PI

export tau = pi * 2

export exp = Math.exp

export sqrt = Math.sqrt

# changed from log as log is a
# common function for logging things
export ln = Math.log

export pow = (^)

export sin = Math.sin

export tan = Math.tan

export cos = Math.cos

export asin = Math.asin

export acos = Math.acos

export atan = Math.atan

export atan2 = (x, y) --> Math.atan2 x, y

# sinh
# tanh
# cosh
# asinh
# atanh
# acosh

export truncate = (x) -> ~~x

export round = Math.round

export ceiling = Math.ceil

export floor = Math.floor

export isItNaN = (x) -> x isnt x

export even = (x) -> x % 2 == 0

export odd = (x) -> x % 2 != 0

export gcd = (x, y) -->
  x = Math.abs x
  y = Math.abs y
  until y is 0
    z = x % y
    x = y
    y = z
  x

export lcm = (x, y) -->
  Math.abs Math.floor (x / (gcd x, y) * y)

# meta
export installPrelude = !(target) ->
  unless target.prelude?isInstalled
    target <<< out$ # using out$ generated by livescript
    target <<< target.prelude.isInstalled = true

export prelude = out$
</textarea></form>
    <script>
      var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
        theme: "solarized light",
        lineNumbers: true
      });
    </script>

    <p><strong>MIME types defined:</strong> <code>text/x-livescript</code>.</p>

    <p>The LiveScript mode was written by Kenneth Bentley.</p>

  </article>