On Apr 10, 2007, at 23:40 , Petr Fischer wrote:

Hi,

methods #and:, #or: etc. are defined in Boolean class only - why this methods are not defined in "blocks" too?

• standard way (brackets mix):

( condition_1 ) and: [ condition_2 ] ...

• this (fictive) way looks beter (for me):

[ condition_1 ] and: [ condition_2 ] ... more complex one: [ [ cond_1 ] and: [ cond_2 ] ] or: [ cond_3 ]

You only need blocks for code that is evaluated conditionally, or repeatedly, or not immediately.

But the receiver of #and: or #or: always must be evaluated. No sense in making it a block. In contrast, the argument to #and: must only be evaluated if the receiver was true. So you need a block there.

If you do not need that shortcut behavior you can simply use #& and #| which take booleans, not blocks as arguments.

- Bert -