reflective-bind-implementation

reflective-bind-implementation.js

function reflectiveBind(f, ctx, ...args) {
  const result = f.bind(ctx, ...args);
  Object.defineProperty(result, "__func", {value: f});
  Object.defineProperty(result, "__ctx", {value: ctx});
  Object.defineProperty(result, "__args", {value: args});
  return result;
}

function reflectiveEqual(f, g) {
  return (
    isReflective(f) &&
    isReflective(g) &&
    f.__ctx === g.__ctx &&
    arrayShallowEq(f.__args, g.__args) &&
    (f.__func === g.__func || reflectiveEqual(f.__func, g.__func))
  );
}

function isReflective(f) {
  return (
    typeof f === "function" &&
    typeof f.__func === "function" &&
    f.hasOwnProperty("__ctx") &&
    Array.isArray(f.__args)
  );
}