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ferret/pkg/stdlib/math/rand.go
Tim Voronov 6933798419
Bugfix/#295 arithmetic operators (#298)
* Some work

* Updated Add operator

* Updated Subtract operator

* Updated Subtract operator tests

* Added tests for multiplication

* Added division

* Updated the rest of operators
2019-05-19 12:12:11 -04:00

39 lines
844 B
Go

package math
import (
"context"
"math/rand"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
)
// Rand return a pseudo-random number between 0 and 1.
// @param max (Float|Int, optional) - Upper limit.
// @param min (Float|Int, optional) - Lower limit.
// @returns (Float) - A number greater than 0 and less than 1.
func Rand(_ context.Context, args ...core.Value) (core.Value, error) {
err := core.ValidateArgs(args, 0, 2)
if err != nil {
return values.None, err
}
if len(args) == 0 {
return values.NewFloat(rand.Float64()), nil
}
var max float64
var min float64
max = float64(values.ToFloat(args[0]))
if len(args) > 1 {
min = float64(values.ToFloat(args[1]))
} else {
max, min = core.NumberBoundaries(max)
}
return values.NewFloat(core.Random(max, min)), nil
}