Evaluate formula in Go

Question

Using Go (golang) I'd like to take a string with a formula and evaluate it with pre-defined values. Here's a way to do it with python's parser module:

x = 8
code = parser.expr("(x + 2) / 10").compile()
print eval(code)
# prints 1

Any idea how to do it with Go?

Answer 1

This package will probably work for your needs: https://github.com/Knetic/govaluate

expression, err := govaluate.NewEvaluableExpression("(x + 2) / 10");

parameters := make(map[string]interface{}, 8)
parameters["x"] = 8;

result, err := expression.Evaluate(parameters);