Function ifIsNumber

Applies numberTransform if the argument is a number, and otherTransform if it is not.

Example

import * as G from "flurp/guard";
import * as N from "flurp/number";
import * as L from "flurp/logic";

const doubleOrUndefined = G.ifIsNumber(N.multiply(2), L.always(undefined);
doubleOrUndefined(3);       // 6
doubleOrUndefined("3");     // undefined