How to use

isFunction

function

in

lodash

async Mutation(resolve, root, args, context, info) {
  const mutation = info.schema.getMutationType().getFields()[info.fieldName]

  if (isFunction(mutation.authorize)) {
   await mutation.authorize(root, args, context, info)
  }

  return resolve(root, args, context, info)
 }

const checkMapData = (mapData) => {
 invariant(
  isFunction(mapData),
  'Expected mapData to be a function that returns a data to display in table.',
 );
 return mapData;
}

setDefault(callback) {

    if (!isFunction(callback))
      throw new Error(`Failed to execute 'setDefaultAction': Parameter 1 is not of type 'function'.`);

    this.default = callback;

  }

function isEqualValue(value, other) {
 if (value === other) { return true; }

 var isImmutableDS = isEqualImmutableDS(value, other);
 if (isImmutableDS !== undefined) { return isImmutableDS; }

 return isEqual(value, other, (current, next) => {
  if (current === next) { return true; }

  if (isFunction(current) && isFunction(next)) {
   return current.toString() === next.toString();
  }

  return isEqualImmutableDS(current, next);
 });
}

test('logger factory functionality', t => {
 var inst = logger('test');
 t.true(isFunction(logger), 'The logger module should export a function');
 t.is(inst.name, 'debug',
  'Invoking the function should return an instance of the debug module');
 t.notThrows(() => logger(),
  'Should be able to create an instance of the logger without providing a namespace');
});

/**
 *
 * @param {*} middlewareReceiver
 * @param {Function[]} middleware
 * @returns {Promise<*[]>}
 */
async function initMiddlewareOn(middlewareReceiver, middleware) {
 return Promise.all(
  toArray(middleware)
   .filter(mw => isFunction(mw))
   .map(mw => invokeOn(middlewareReceiver, 'use', mw))
 );
}

inflect(commandName, handler) {
    if (isFunction(handler[this.methodName]) === false) {
      InvalidHandlerMethodException.forMethod(this.methodName);
    }

    return this.methodName;
  }

const looper = (result, resource, authObject) => reduce(resource, (result, func, key) => {
 result[key] = isFunction(func) ? binder(func, authObject) : looper(result, func, authObject)
 return result
}, {})

/**
 * Checks if provided function is an AsyncFunction
 * @param {Function} fn
 * @returns {boolean}
 */
function isAsyncFunction(fn) {
 if (!isFunction(fn)) {
  return false;
 }

 return fn.constructor.name === 'AsyncFunction';
}

/**
 *
 * @param {Function} fn
 * @returns {boolean}
 */
function isArrowFunction(fn) {
 return isFunction(fn) && !fn.prototype;
}

async Query(resolve, root, args, context, info) {
  const query = info.schema.getQueryType().getFields()[info.fieldName]

  if (isFunction(query.authorize)) {
   await query.authorize(root, args, context, info)
  }

  return resolve(root, args, context, info)
 }

/**
 * Checks if provided function is an AsyncFunction
 * @param {Function} fn
 * @returns {boolean}
 */
function isAsyncFunction(fn) {
 if (!isFunction(fn)) {
  return false;
 }

 return fn.constructor.name === 'AsyncFunction';
}

const checkActionCreator = (actionCreator) => {
 invariant(
  isFunction(actionCreator),
  'Expected actionCreator to be a function that returns an API action.',
 );
 return actionCreator;
}

async Mutation(resolve, root, args, context, info) {
  const mutation = info.schema.getMutationType().getFields()[info.fieldName]

  if (isFunction(mutation.authorize)) {
   await mutation.authorize(root, args, context, info)
  }

  return resolve(root, args, context, info)
 }

async Query(resolve, root, args, context, info) {
  const query = info.schema.getQueryType().getFields()[info.fieldName]

  if (isFunction(query.authorize)) {
   await query.authorize(root, args, context, info)
  }

  return resolve(root, args, context, info)
 }