https://github.com/sandertv/go-formula

A go package for simple formula parsing and evaluation
https://github.com/sandertv/go-formula

evaluate formula golang

Last synced: 4 days ago
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A go package for simple formula parsing and evaluation

• Host: GitHub
• URL: https://github.com/sandertv/go-formula
• Owner: Sandertv
• License: mit
• Created: 2019-03-09T10:54:34.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2020-09-02T09:55:59.000Z (over 4 years ago)
• Last Synced: 2025-03-30T08:32:11.216Z (about 1 month ago)
• Topics: evaluate, formula, golang
• Language: Go
• Size: 45.9 KB
• Stars: 18
• Watchers: 2
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# go-formula [![GoDoc](http://godoc.org/github.com/Sandertv/go-formula?status.svg)](https://godoc.org/github.com/Sandertv/go-formula/v2)

A simple and fast formula parser and evaluator.

## Getting Started

### Usage

Formulas may be parsed using the formula.New() function. The function returns a formula that may be evaluated

an unlimited amount of times. Note that parsing formulas is generally heavier than evaluating them, so it is

recommended to parse once and evaluate the same formula multiple times where applicable.

```go

package main

import (

	"github.com/sandertv/go-formula/v2"

	"log"

)

func main() {

    f, err := formula.New("17*x + pow(z*3, 3)")

    if err != nil {

        log.Print(err)

        return

    }

    x := formula.Var("x", 4.5)

    z := formula.Var("z", 5)

    log.Printf("Formula output: %v", f.MustEval(x, z))

}

```

### Documentation

https://godoc.org/github.com/Sandertv/go-formula/v2