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- import isObject from './isObject';
- /** `Object#toString` result references. */
- var funcTag = '[object Function]';
- /** Used for native method references. */
- var objectProto = Object.prototype;
- /**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
- */
- var objToString = objectProto.toString;
- /**
- * Checks if `value` is classified as a `Function` object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isFunction(_);
- * // => true
- *
- * _.isFunction(/abc/);
- * // => false
- */
- function isFunction(value) {
- // The use of `Object#toString` avoids issues with the `typeof` operator
- // in older versions of Chrome and Safari which return 'function' for regexes
- // and Safari 8 which returns 'object' for typed array constructors.
- return isObject(value) && objToString.call(value) == funcTag;
- }
- export default isFunction;
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