Cleaned up some code

[InternetExplorer7]

Motivation

Clean up some component.

Have you read the Contributing Guidelines on pull requests?

ya.

Test Plan

Basically moved a complicated map function to outside of render's return.

Explantation

I chose this chunk of code smell because I wanted to reduce the amount of code inside of render's return, which should mostly contain just markup and as little logic in it as possible.

[yangshun]

Thanks for the PR! Unfortunately, mapping to a component is not really considered logic, more like configuration. Moving the initialization of the component out of render also doesn't really add much value.