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Let me try and summarize what you have said so I can respond better:

  • Until when used properly should not contain a negation.
  • You implicitly seem to agree that negations in complex expressions do complicate programs.

Of course until simplifies things when used properly which is why I said :

However I believe that the use of until and unless and the likes are dangerous for precisely this reason. I find it far better to use while( ! ) and if(!) for complex conditions.

The problem is that one might start with:

until( eof ) {
Which might becomes:
until( eof or $found_all_elements_i_was_looking_for ) {
which might then become:
until( $no_error_opening_file or ( eof and $need_not_process_beyond_eof ) or $found_all_elements_i_was_looking_for ) {

Of course when each of $no_error_opening_file ... are themselves expressions its not simple anymore.

It is for exactly the same reason that I believe its good to have a ',' after the last element of a hash or to always ensure that ifs have blocks even if whats in the if is a single statement.

I will ignore the first and last chunks as they have little to do with my original thesis.

Given this I dont see where the disagreement lies? Did I miss something?


In reply to Re^4: Untillian Headache or about the semantic of until by tmharish
in thread Untillian Headache or about the semantic of until by Discipulus

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