From: Michael Witten <mfwitten@gmail.com>
To: Jay Soffian <jaysoffian@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH RFC3.5 05/12] send-email: Improve redability and error-handling in send_message's sendmail code
Date: Sat, 18 Apr 2009 21:13:20 -0500 [thread overview]
Message-ID: <b4087cc50904181913g117937le333c3b255f7d184@mail.gmail.com> (raw)
In-Reply-To: <76718490904181851g2701ce59x614ea60452b914ce@mail.gmail.com>
On Sat, Apr 18, 2009 at 20:51, Jay Soffian <jaysoffian@gmail.com> wrote:
> What is '//' about?
It's called the Logical Defined-OR:
http://perldoc.perl.org/perlop.html#C-style-Logical-Defined-Or
> Although it has no direct equivalent in C, Perl's // operator is related to its C-style or. In fact, it's exactly the same as ||, except that it tests the left hand side's definedness instead of its truth. Thus, $a // $b is similar to defined($a) || $b (except that it returns the value of $a rather than the value of defined($a)) and is exactly equivalent to defined($a) ? $a : $b . This is very useful for providing default values for variables. If you actually want to test if at least one of $a and $b is defined, use defined($a // $b) ...
However, I wonder if your comment is a veiled quip at my "Improve
redability" claim (which is also ironically unreadable). :-)
next prev parent reply other threads:[~2009-04-19 2:14 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-18 17:01 [PATCH RFC3.5 00/12] Introduction to Decreasing send-email Entropy Michael Witten
2009-04-18 17:01 ` [PATCH RFC3.5 01/12] send-email: Cleanup the usage text and docs a bit Michael Witten
2009-04-18 17:01 ` [PATCH RFC3.5 02/12] send-email: No longer repeatedly test if $smtp_server is a command Michael Witten
2009-04-18 17:01 ` [PATCH RFC3.5 03/12] send-email: Interpret --smtp-server "" as "use a default" Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 04/12] send-email: Verification for --smtp-server and --smpt-server-port Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 05/12] send-email: Improve redability and error-handling in send_message's sendmail code Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 06/12] send-email: Cleanup and streamline the SMTP code in send_message Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 07/12] send-email: Cleanup send_message 'log' code Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 08/12] send-email: Move Subject sanitization from --compose code to send_message Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 09/12] Docs: send-email: Reorganize the CONFIGURATION section Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 10/12] Docs: Embolden the CONFIGURATION references Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 11/12] Docs: send-email: Clarification of sendemail.<identity> Michael Witten
2009-04-18 17:02 ` [PATCH RFC3.5 12/12] Docs: send-email: git send-email -> 'send-email' Michael Witten
2009-04-19 1:54 ` [PATCH RFC3.5 08/12] send-email: Move Subject sanitization from --compose code to send_message Jay Soffian
2009-04-19 2:37 ` Michael Witten
2009-04-19 14:13 ` Jay Soffian
2009-04-19 14:39 ` Michael Witten
2009-04-19 14:53 ` Michael Witten
2009-04-19 16:43 ` [PATCH RFC3.5.1 08/12] send-email: Simplify --compose subject sanitation Michael Witten
2009-04-21 2:34 ` Jeff King
2009-04-21 3:29 ` Michael Witten
2009-04-20 1:42 ` [PATCH RFC3.5 06/12] send-email: Cleanup and streamline the SMTP code in send_message Junio C Hamano
2009-04-20 5:38 ` Michael Witten
2009-04-20 6:43 ` Junio C Hamano
2009-04-19 1:51 ` [PATCH RFC3.5 05/12] send-email: Improve redability and error-handling in send_message's sendmail code Jay Soffian
2009-04-19 2:13 ` Michael Witten [this message]
2009-04-19 2:17 ` Thomas Adam
2009-04-19 2:43 ` Michael Witten
2009-04-19 4:44 ` Junio C Hamano
2009-04-19 13:49 ` [PATCH RFC3.5.1 05/12] send-email: Improve readability " Michael Witten
2009-04-19 14:16 ` [PATCH RFC3.5 05/12] send-email: Improve redability " Jay Soffian
2009-04-20 1:38 ` Junio C Hamano
2009-04-20 1:58 ` Junio C Hamano
2009-04-21 2:00 ` Jeff King
2009-04-21 3:14 ` Jeff King
2009-04-19 14:19 ` [PATCH RFC3.5.1 04/12] send-email: Verification for --smtp-server and --smpt-server-port Michael Witten
2009-04-20 15:53 ` Michael Witten
2009-04-20 1:42 ` [PATCH RFC3.5 " Junio C Hamano
2009-04-20 2:38 ` Junio C Hamano
2009-04-20 3:49 ` Michael Witten
2009-04-20 3:49 ` [PATCH RFC3.5 06/12] send-email: Cleanup and streamline the SMTP code in send_message Michael Witten
2009-04-18 23:35 ` [PATCH RFC3.5 03/12] send-email: Interpret --smtp-server "" as "use a default" Wesley J. Landaker
2009-04-19 0:13 ` Michael Witten
2009-04-19 14:16 ` [PATCH RFC3.5.1 " Michael Witten
2009-04-20 1:41 ` [PATCH RFC3.5 " Junio C Hamano
2009-04-20 2:52 ` Michael Witten
2009-04-20 1:41 ` [PATCH RFC3.5 02/12] send-email: No longer repeatedly test if $smtp_server is a command Junio C Hamano
2009-04-20 2:37 ` Michael Witten
2009-04-20 4:21 ` Junio C Hamano
2009-04-20 4:53 ` Subject: " Michael Witten
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