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A codeblock is a convenient way to create a small anonymous function and assign it directly to a variable or property. The code is physically close to its usage and easy to see. In contrast, a function pointer refers to a function defined elsewhere, perhaps much later in the same program file, or in a different program file.

Functions are easier to maintain. Their syntax is not cramped like codeblocks, and it’s easier to include readable comments in the code. In a class definition, all FUNCTION definitions are all together at the bottom. Codeblocks are scattered throughout the constructor. If you want to run the same code from multiple locations, using function pointers that point to the same function means that changing the code requires changing the function once; multiple codeblocks would require changing each codeblock individually.

You can create a codeblock at runtime by constructing a string that looks like a codeblock and using the macro operator to evaluate it.