Re: Is there a way to do comment with just one keystroke at the start

*To*: mathgroup at smc.vnet.net*Subject*: [mg128718] Re: Is there a way to do comment with just one keystroke at the start*From*: David Bailey <dave at removedbailey.co.uk>*Date*: Mon, 19 Nov 2012 19:18:39 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <20121113050518.D63FE69AB@smc.vnet.net> <k7vevv$s52$1@smc.vnet.net>

On 14/11/2012 06:50, Murray Eisenberg wrote: > On Nov 13, 2012, at 12:05 AM, Eric Rasmusen<erasmuse61 at gmail.com> wrote: >> >> The standard way to do comments in Mathematica is like this >> (*Here is a comment*) >> >> In Latex, a short comment only takes one symbol, at the start of the line: >> %Here is a latex comment >> >> Is there a way to comment in Mathematica without the closing symbols? is there an any easy way to make a macro to imitate latex comments? > > Sorry, but that's the way it is. > > Of course you could use Text cells instead of embedding comments inside an Input cell. > > That won't work, of course, if you need to insert comments within (too?)-long code in an Input cell. In the latter case, you could try the following: > > Comment[blah___] := Null > > For example: > > Comment["first we do this"] > 1 + 1 > Comment[next] > x + 2 > Comment[] > Unfortunately, this breaks for certain comment positions: In[809]:= Comment[blah___] := Null In[810]:= Sin[Comment["angle"] Pi] Out[810]= Sin[Null \[Pi]] Possibly a slightly better version would be: Comment[blah___] := Sequence @@ {} However, even that will fail if used inside Hold[...], and probably in other situations as well, so I don't advise using it. I think a UNICODE character reserved for comment out of one line would be a valuable feature, and maybe also a pair of characters equivalent to (* and *), which are IMHO very ugly! David Bailey http://www.dbaileyconsultancy.co.uk

**References**:**Is there a way to do comment with just one keystroke at the start as***From:*Eric Rasmusen <erasmuse61@gmail.com>