How do I view the type of a scala expression in IntelliJ

Question

The Eclipse scala plugin has a nice feature which shows you the type of a variable when you hover the mouse over it. How do I see the same information with the IntelliJ plu

Answer 1

Hold down the Command key as you mouseover. Note: I tested this on Mac OS X with standard keybindings. Different OSes or non-standard keybindings may of course be different, but the functionality is certainly there.

Answer 2

In IntelliJ 2016 and later with Mac OS X 10.5+ keybindings the keybinding is Ctrl+⇧+P.

Old answer:

Under MacOS with Mac OS X 10.5+ keybindings, it is supposed to be ⌘+=, however that does not seem to work at all (for me).

In the settings (Preferences > Keymap and enter "Type Info" in the search field), I added the shortcut Ctrl+⌘+T to the action. This shortcut works fine.

Answer 3

For OS X, use ctrl + J on a variable, function or signature to get full definition, type, and parameters. Use ctrl + shift + P for evaluated type (this also works on highlighted code block or expression).

Answer 4

Select expression and type Alt + =.

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If you want to change the shortcut go to Preferences > Keymap and enter "Type Info" in the search field.

In older versions, it's Shift + Ctrl + Alt + T.