34c3112 · elk · git.iko.soy

git.iko.soy/elk

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add isNaN and isFinite as native functions

34c3112Evan Czaplicki13 years ago

libraries/Basics.elm+14

compare with master

unifiedsplit

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

30# Number Conversions

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

33+# Floating Point Checks

34+@docs isNaN, isFinite

35+

33# Angle Conversions

36# Angle Conversions

34All angle conversions result in “standard Elm angles”

37All angle conversions result in “standard Elm angles”

35which happen to be radians.

38which happen to be radians.

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

271toFloat : Int -> Float

274toFloat : Int -> Float

272toFloat = Native.Basics.toFloat

275toFloat = Native.Basics.toFloat

273

276

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

274

288

275-- Function Helpers

289-- Function Helpers

276

290

libraries/Native/Basics.js+2

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

53 floor:Math.floor,

54 round:Math.round,

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

56+ isNaN:isNaN,

57+ isFinite:isFinite

56 };

58 };

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

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