Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Re^4: Purpose of =~ and = in this statement

by Anonymous Monk
on May 26, 2022 at 03:10 UTC ( #11144189=note: print w/replies, xml ) Need Help??


in reply to Re^3: Purpose of =~ and = in this statement
in thread Purpose of =~ and = in this statement

"zero but true"

"0 but true"

Replies are listed 'Best First'.
Re^5: Purpose of =~ and = in this statement
by Marshall (Canon) on May 26, 2022 at 18:33 UTC
    Thanks for the correction, my memory was fuzzy.

    I think that this string "0 but true" is a very ancient artifact dating from before scientific notation. I have never seen this in my coding. I have however encountered "0E0" with the DBI as the normal, standard way to say "statement worked correctly, but produced a zero result", true in a logical comparison sense, but numeric zero in a numeric sense.

      "0 but true" is the self-documenting way to have a zero value evaluating to true, "0E0" is the clever but not so obvious one.

      Alexander

      --
      Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)
        I am not the judge or the author of either one of these variations. I simply report that 0E0 is in current use.

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://11144189]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others surveying the Monastery: (8)
As of 2022-08-17 23:35 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?