The lambda arrow consists of a minus and a greater than sign. However, some IDEs will display the lambda as an actual arrow, like this: →
It is a matter of taste whether you like this or not. However, even if you don't use these font ligatures, as they are called, it is useful to know what they are in case you do some coding with a colleague, and they are using them.
In IntelliJ IDEA, every time you move away from the IDE and go to another application, it automatically saves all our files. It also keeps a local history in case we make a mistake and need to roll back to a previous version. NetBeans does not automatically save our working files, although since it is so configurable, I would not be surprised if it can be set up to do exactly that.
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