Handle return in ES6 lambda expression

More details about how to handle the implicit and explicit can be found in the follow URL: http://stackoverflow.com/questions/28889450/when-should-i-use-return-in-es6-arrow-functions

Change generated import from double quote to single quote

[Issue]
The generated import statements for typescript in intellij IDE is im double quote, the style guidance of typescript complaints on that, so it needs to be changed to single quote.

[Approach for Intellij 2016]
Intellij IDEA -> Preferences-> Editor -> TypeScript -> Other -> Generated Code -> Quote marks: Single quote -> apply -> o.k.

[Approach for Intellij 2018.1]

Intellij IDEA -> Preferences-> Editor -> Code Style -> TypeScript -> Punctuation -> Use “double” quotes “always” :  “Single” quotes “always” -> apply -> o.k.

[Reference]

For Webstorm user, please check out the approach from following settings suggested on stackoverflow :
http://stackoverflow.com/questions/35918707/how-to-make-webstorm-reformatting-source-code-to-change-double-quotes-to-singl