Alright, I'm gonna be the one who posts this.
const calc = exp => eval(exp)
If you add a check to verify the string is well formed, this will probably be the best and simplest answer.
Similarly unfair, the solution in R:
calc <- function (expr) { eval(parse(text=expr)) }
> calc("2 / 2 + 3 * 4 - 6") [1] 7
Warning: don't do this.
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Alright, I'm gonna be the one who posts this.
If you add a check to verify the string is well formed, this will probably be the best and simplest answer.
Similarly unfair, the solution in R:
Warning: don't do this.