Adding math utility functions

packages/squiggle-lang/src/rescript/FunctionRegistry/FunctionRegistry_Helpers.res

@@ -5,6 +5,8 @@ let impossibleError = "Wrong inputs / Logically impossible"
 module Wrappers = {
   let symbolic = r => DistributionTypes.Symbolic(r)
   let evDistribution = r => ReducerInterface_ExpressionValue.EvDistribution(r)
+  let evNumber = r => ReducerInterface_ExpressionValue.EvNumber(r)
+  let evArray = r => ReducerInterface_ExpressionValue.EvArray(r)
   let symbolicEvDistribution = r => r->DistributionTypes.Symbolic->evDistribution
 }
 
@@ -77,6 +79,21 @@ module Prepare = {
       pairs
     }
   }
+
+  let oneNumber = (values: t): result<float, err> => {
+    switch values {
+    | FRValueNumber(a1) => Ok(a1)
+    | _ => Error(impossibleError)
+    }
+  }
+
+  module ToTypedArray = {
+    let numbers = (inputs: ts): result<array<float>, err> => {
+      let openNumbers = (elements: array<t>) =>
+        elements->E.A2.fmap(oneNumber)->E.A.R.firstErrorOrOpen
+      inputs->E.A.unsafe_get(0)->ToValueArray.Array.openA->E.R.bind(openNumbers)
+    }
+  }
 }
 
 module Process = {
@@ -183,9 +200,25 @@ module OneArgDist = {
     ->E.R.bind(Process.DistOrNumberToDist.oneValueUsingSymbolicDist(~fn, ~value=_, ~env))
     ->E.R2.fmap(Wrappers.evDistribution)
 
-  let make = (name, fn) => {
+  let make = (name, fn) =>
     FnDefinition.make(~name, ~inputs=[FRTypeDistOrNumber], ~run=(inputs, env) =>
       inputs->Prepare.ToValueTuple.oneDistOrNumber->process(~fn, ~env)
     )
 }
+
+module ArrayNumberDist = {
+  let make = (name, fn) => {
+    FnDefinition.make(~name, ~inputs=[FRTypeArray(FRTypeNumber)], ~run=(inputs, _) =>
+      Prepare.ToTypedArray.numbers(inputs)->E.R2.fmap(fn)
+    )
+  }
+}
+
+module NumberToNumber = {
+  let make = (name, fn) =>
+    FnDefinition.make(~name, ~inputs=[FRTypeNumber], ~run=(inputs, _) => {
+      let num =
+        inputs->E.A.unsafe_get(0)->Prepare.oneNumber->E.R2.fmap(fn)->E.R2.fmap(Wrappers.evNumber)
+      num
+    })
 }

packages/squiggle-lang/src/rescript/FunctionRegistry/FunctionRegistry_Library.res

@@ -134,4 +134,84 @@ let registry = [
     ~name="Bernoulli",
     ~definitions=[OneArgDist.make("bernoulli", SymbolicDist.Bernoulli.make)],
   ),
+  Function.make(
+    ~name="Floor",
+    ~definitions=[NumberToNumber.make("floor", Js.Math.floor_float)]
+  ),
+  Function.make(
+    ~name="Ceiling",
+    ~definitions=[NumberToNumber.make("ceil", Js.Math.ceil_float)]
+  ),
+  Function.make(
+    ~name="Absolute Value",
+    ~definitions=[NumberToNumber.make("abs", Js.Math.abs_float)]
+  ),
+  Function.make(
+    ~name="Exponent",
+    ~definitions=[NumberToNumber.make("exp", Js.Math.exp)]
+  ),
+  Function.make(
+    ~name="Log",
+    ~definitions=[NumberToNumber.make("log", Js.Math.log)]
+  ),
+  Function.make(
+    ~name="Log Base 10",
+    ~definitions=[NumberToNumber.make("log10", Js.Math.log10)]
+  ),
+  Function.make(
+    ~name="Log Base 2",
+    ~definitions=[NumberToNumber.make("log2", Js.Math.log2)]
+  ),
+  Function.make(
+    ~name="Round",
+    ~definitions=[NumberToNumber.make("round", Js.Math.round)]
+  ),
+  Function.make(
+    ~name="Sum",
+    ~definitions=[ArrayNumberDist.make("sum", r => r->E.A.Floats.sum->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Product",
+    ~definitions=[ArrayNumberDist.make("product", r => r->E.A.Floats.product->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Min",
+    ~definitions=[ArrayNumberDist.make("min", r => r->E.A.Floats.min->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Max",
+    ~definitions=[ArrayNumberDist.make("max", r => r->E.A.Floats.max->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Mean",
+    ~definitions=[ArrayNumberDist.make("mean", r => r->E.A.Floats.mean->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Geometric Mean",
+    ~definitions=[ArrayNumberDist.make("geomean", r => r->E.A.Floats.geomean->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Standard Deviation",
+    ~definitions=[ArrayNumberDist.make("stdev", r => r->E.A.Floats.stdev->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Variance",
+    ~definitions=[ArrayNumberDist.make("variance", r => r->E.A.Floats.stdev->Wrappers.evNumber)],
+  ),
+  Function.make(
+    ~name="Sort",
+    ~definitions=[
+      ArrayNumberDist.make("sort", r =>
+        r->E.A.Floats.sort->E.A2.fmap(Wrappers.evNumber)->Wrappers.evArray
+      ),
+    ],
+  ),
+  Function.make(
+    ~name="Reverse",
+    ~definitions=[
+      ArrayNumberDist.make("reverse", r =>
+        r->Belt_Array.reverse->E.A2.fmap(Wrappers.evNumber)->Wrappers.evArray
+      ),
+    ],
+  ),
 ]

packages/squiggle-lang/src/rescript/Utility/E.res

@@ -720,6 +720,7 @@ module A = {
     let variance = Jstat.variance
     let stdev = Jstat.stdev
     let sum = Jstat.sum
+    let product = Jstat.product
     let random = Js.Math.random_int
 
     let floatCompare: (float, float) => int = compare