mathjs/src/expression/function/evaluate.js at develop · Josef37/mathjs · GitHub

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import { deepMap } from '../../utils/collection.js'

import { factory } from '../../utils/factory.js'

const name = 'evaluate'

const dependencies = ['typed', 'parse']

export const createEvaluate = /* #__PURE__ */ factory(name, dependencies, ({ typed, parse }) => {

/**

* Evaluate an expression.

* Note the evaluating arbitrary expressions may involve security risks,

* see [https://mathjs.org/docs/expressions/security.html](https://mathjs.org/docs/expressions/security.html) for more information.

* Syntax:

* math.evaluate(expr)

* math.evaluate(expr, scope)

* math.evaluate([expr1, expr2, expr3, ...])

* math.evaluate([expr1, expr2, expr3, ...], scope)

* Example:

* math.evaluate('(2+3)/4') // 1.25

* math.evaluate('sqrt(3^2 + 4^2)') // 5

* math.evaluate('sqrt(-4)') // 2i

* math.evaluate(['a=3', 'b=4', 'a*b']) // [3, 4, 12]

* let scope = {a:3, b:4}

* math.evaluate('a * b', scope) // 12

* See also:

* parse, compile

* @param {string | string[] | Matrix} expr The expression to be evaluated

* @param {Object} [scope] Scope to read/write variables

* @return {*} The result of the expression

* @throws {Error}

return typed(name, {

string: function (expr) {

const scope = {}

return parse(expr).compile().evaluate(scope)

'string, Object': function (expr, scope) {

return parse(expr).compile().evaluate(scope)

'Array | Matrix': function (expr) {

const scope = {}

return deepMap(expr, function (entry) {

return parse(entry).compile().evaluate(scope)

})

'Array | Matrix, Object': function (expr, scope) {

return deepMap(expr, function (entry) {

return parse(entry).compile().evaluate(scope)

})

}

})

mathjs/src/expression/function/evaluate.js at develop · Josef37/mathjs · GitHub

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