thanks. Seems that my programs are very simple and don't need these feature yet.
Kent Johnson wrote: > [EMAIL PROTECTED] wrote: > > counting that out(regardless whether it is (dis)advantage or not), what > > else a block can do but not a named function ? > > My limited understanding is that the advantage is > - simpler syntax > - high level of integration into the standard library (*many* methods that > take closure arguments). Blocks are used not just for iteration but for the > kinds of things shown in the examples to PEP 343 > http://www.python.org/peps/pep-0343.html > > For example to open a file and read from it uses two closures, one to wrap a > block with the file open/close, one to iterate lines (from the pickaxe book): > > File.open("testfile") do |file| > file.each_line { |line| puts line } > end > > Kent > > > > > Alex Martelli wrote: > > > >>[EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > >> > >> > >>>could someone enlighten me what is the advantage of block over named > >>>function ? > >>> > >>>One thing that I can see a difference may be lexical scope ? > >> > >>"Yes, but" -- according to the latest Ruby book, the "mixed lexical > >>scope" of blocks is a highly controversial notion in the Ruby community; > >>so I wouldn't necessarily count it as an _advantage_ of Ruby blocks... > >> > >> > >>Alex > > > > -- http://mail.python.org/mailman/listinfo/python-list
