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+# is-function
+
+[![browser support](https://ci.testling.com/grncdr/js-is-function.png)](https://ci.testling.com/grncdr/js-is-function)
+
+Is that thing a function? Use this module to find out.
+
+## API
+
+### module.exports = function isFunction(fn) -> Boolean
+
+Return `true` if `fn` is a function, otherwise `false`.
+
+## Why not typeof fn === 'function'
+
+Because certain old browsers misreport the type of `RegExp` objects as functions.
+
+## Acknowledgements
+
+I stole this from https://github.com/ljharb/object-keys
+
+## License
+
+MIT