34c3112 · elk · git.iko.soy

add isNaN and isFinite as native functions

commit34c3112f68a9fe52b7fa347a99193b3baf76f1df authorEvan Czaplicki <info@elm-lang.org> dateThu 20 Mar 2014, 15:37 (13 years ago) parenta5ee99d

2 files changed+16

unifiedsplit

libraries/Basics.elm+14

@@ -30,6 +30,9 @@ are your tuples so big?

3030# Number Conversions

3131@docs round, floor, ceiling, truncate, toFloat

3232

33+# Floating Point Checks

34+@docs isNaN, isFinite

35+

3336# Angle Conversions

3437All angle conversions result in “standard Elm angles”

3538which happen to be radians.

@@ -271,6 +274,17 @@ ceiling = Native.Basics.ceiling

271274toFloat : Int -> Float

272275toFloat = Native.Basics.toFloat

273276

277+{- | Determines whether a float is an undefined or unrepresentable number,

278+such as 0/0. NaN stands for *not a number*.

279+-}

280+isNaN : Float -> Bool

281+isNaN = Native.Basics.isNaN

282+

283+{- | Determines whether a float is finite. Positive and negative infinity are

284+valid floating point numbers, created by computations like `1/0` and `-1/0`.

285+-}

286+isFinite : Float -> Bool

287+isFinite = Native.Basics.isFinite

274288

275289-- Function Helpers

276290

libraries/Native/Basics.js+2

@@ -53,6 +53,8 @@ Elm.Native.Basics.make = function(elm) {

5353 floor:Math.floor,

5454 round:Math.round,

5555 toFloat:function(x) { return x; },

56+ isNaN:isNaN,

57+ isFinite:isFinite

5658 };

5759

5860 return elm.Native.Basics.values = basics;