It it a toolbox for javascript( and typescript ).

One day, I want to use HashMap/HashSet and found something package to use it, but I found something wrong, this map is hash with 'toString()' function, that mean it can't identity what difference between two instance of one class, it is a huge mistake.

Then I think, Why do I write my own toolkit ? so reference java 7 api document and source code to write this tools.

After all, I don't know how to write a red-black tree, not yet. = =|| And hashMap added red-black tree in java 8.

include:

1. exception - as the name say
2. lang - something common tool like event, type-judgement, also implement object.hashcode
3. collection - a collection definition, written reference to java 7 api document
4. list - ArrayList, ArrayDeque, LinkedList
5. map - HashMap, HashSet

That all.