Function isFunction

packages/dva-core/src/utils.js:3–3

export isPlainObject from 'is-plain-object';
export const isArray = Array.isArray.bind(Array);
export const isFunction = o => typeof o === 'function';
export const returnSelf = m => m;
// avoid es6 array.prototype.findIndex polyfill
export const noop = () => {};