Accessing this recipe

If you want to translate JavaScript functions to Amber calls there are two cases.

1. If this gets accessed in a method it is referred to as self.
2. Inside an Amber block closure it is impossible to get to true this. However, there is a transformation that allows you capture this as a block argument:

 [ :thisarg :otherarg | ...code... ] currySelf

This produces a block that executes ...code... but the first argument (thisarg in the example) is not a 'real' argument any more. thisarg captures this and the first value the block gets evaluated with is stored in otherarg.