Evaluate expression in scope

[m7mdtiger]

Hello,

I try to use evaluate() but it through an error if the value in scope is an expression

let scope = {
  x: "y + 4",
  y: "c+ 4",
  c: "2"
}
console.log(mathjs.evaluate(scope.x, scope)) # Through an Error: Cannot convert "c + 4" to a number

I think that it would be nice to support solving such cases..

let resolvedScope = {};

while(Object.keys(scope).length > 0) {
    for(const key in scope) {
        try {
          resolvedScope[key] = mathjs.evaluate(scope[key], resolvedScope);
          delete scope[key];
        } catch(error) {
          // continue
        }
    }
}

Thank you.

[josdejong]

The expression parser does not evaluate variables from the scope as an expression.

It would be interesting though to think though implementing a solver that can resolve these kind of Excel-like expressions.

See also:

• Substitution of symbols in scope #904
• function to solve equations #2689

[m7mdtiger]

Thank you.