|[ < ]||[ > ]||[ << ]||[ Up ]||[ >> ]||[Top]||[Contents]||[Index]||[ ? ]|
The function type hasn't been discussed in any depth earlier. You've seen it used but not really explained in any detail. However, it's very important that you do understand how they work, as you can build very complex and effective expressions using them, and above all you will both see them used and even be forced to use them here and there. All the functions that used to take function names as strings now take function pointers as arguments instead.
3.1.1 The basics of the function type The very basics 3.1.2 Partial argument lists Using partial argument lists 3.1.3 Complex function applications In-line function applications