A simple and easy to extend BIDMAS calculator for JavaScript
After somehow importing the code, you can (NB: I haven't fully tested everything) do stuff like
separate("1 + 2 * 3")The return value of which is
{type: "number", value: "1"},
{type: "op", precedence: 1, value: "+"},
{type: "number", value: "2"},
{type: "op", precedence: 0, value: "*"},
{type: "number", value: "3"}
You can then fiddle with this before passing it to calculate.
calculate(separate("1 + 2 * 3"))
Which will of course output 7.
There is a shortcut if you don't want to modify anything before calculating the result. This is the solve(str) function, which will pass the argument to seperate and the return value of that to calculate before returning the final answer.
solve("1 + 2 * 3")
Is therefore equivilent.
I'll write this section later :)