Re: [Orgmode] [babel] passing strings in
Dan Davison writes:
> Dan Davison writes:
>
[...]
>> Hi Eric,
>>
>> Thanks for the much better answer. I think my vote goes for your second
>> option.
>
> Actually, although I think what I said below is valid, it's much less
> obvious what a good solution is because I completely ignored the
> (common) possibility of referring to a table:
>
> :var x=tablename
>
> In that case it is less appealing, although a possibility, to demand
> that we write :var x=tablename() [1]
>
My problem with this path is that then we can't pass a string value into
a variable in which the last two characters are "(" and ")" because it
would be interpreted as a reference. I'm liking the current solution at
http://eschulte.github.com/babel-dev/DONE-literal-values-from-tables.html
Cheers -- Eric
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Re: [Orgmode] [babel] passing strings in
Dan Davison writes: > "Eric Schulte" writes: > >> Hi Maurizio, >> >> The ip addresses in your table are being interpreted as source/reference >> names which org-babel is trying to resolve. In order to differentiate >> between strings and reference names, we either must surround all strings >> in double quotes (as below) or we must end all references with "()" and >> disallow any strings which end in "()". > > Hi Eric, > > Thanks for the much better answer. I think my vote goes for your second > option. Actually, although I think what I said below is valid, it's much less obvious what a good solution is because I completely ignored the (common) possibility of referring to a table: :var x=tablename In that case it is less appealing, although a possibility, to demand that we write :var x=tablename() [1] However, I do still feel that having to quote the strings in Maurizio's example is unfortunate -- so my current position is not very helpful: I'm not sure what a good solution is. Dan Footnotes: [1] There are two cases: 1. Normal org table not associated with code block 2. Table created by code block In the case of (2) it makes some sense to use the name() notation because the same name is used to name the results table as is used to name the code block which generates the table. > In other words, :var x=blockname passes the string "blockname", > whereas :var x=blockname() passes the result of evaluating a block > called "blockname". > > One argument for this is that in order to pass arguments to a block > being evaluated as a reference, users are already obliged to use the > parenthetic function call syntax: > > :var x=blockname(arg1=val1) > > so demanding the parentheses in the absence of arguments is natural (and > perhaps even serves to remind users of the possibility of passing > arguments). > > Also I think that users will probably pass strings more often than they > will pass the results of block reference evaluations, so > interpreting :var=blockname as a string literal may also be justified by > Least Surprise for naive users (e.g. apparently me...). > > Dan > > > > >> Currently we are taking the >> former approach, which means your table will require the following to >> work... >> >> #+TBLNAME: system-host-ping :var host=system-hosts >> | name | ip | ping | >> |+--+| >> | host 1 | "192.168.10.200" | 192.168.10.200 | >> | host 2 | "192.168.10.24" | 192.168.10.24 | >> | host 3 | "192.168.42.24" | 192.168.42.24 | >> #+TBLFM: $3='(sbe system-ping (ip $2))' >> >> #+source: system-ping >> #+begin_src sh :var ip=0 >> # This is what I eventually want >> #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 >> #echo $? >> >> # Testing >> echo $ip >> #+end_src >> >> I'd be open to discussion on this issue. I suppose if reference >> resolution fails we could try using the name as a string literal, but >> that could lead to debugging nightmares... >> >> Cheers -- Eric >> >> Maurizio Vitale >> writes: >> >>> In the table/block pair below, I'm trying to pass an IP number to some >>> shell code. It seems like in the table formula I can only have >>> numbers. Is that right? >>> >>> #+TBLNAME: system-host-ping :var host=system-hosts >>> | name | ip | ping | >>> |---++| >>> | host 1| 192.168.10.200 | #ERROR | >>> | host 2| 192.168.10.24 | #ERROR | >>> | host 3| 192.168.42.24 | #ERROR | >>> #+TBLFM: $3='(sbe system-ping (ip $2))' >>> >>> #+source: system-ping >>> #+begin_src sh >>> # This is what I eventually want >>> #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 >>> #echo $? >>> >>> # Testing >>> echo $ip >>> #+end_src >>> >>> Any way to pass arbitrary strings? >>> >>> Thanks a lot, >>> >>>Maurizio >>> >>> >>> >>> >>> ___ >>> Emacs-orgmode mailing list >>> Please use `Reply All' to send replies to the list. >>> Emacs-orgmode@gnu.org >>> http://lists.gnu.org/mailman/listinfo/emacs-orgmode >> >> >> ___ >> Emacs-orgmode mailing list >> Please use `Reply All' to send replies to the list. >> Emacs-orgmode@gnu.org >> http://lists.gnu.org/mailman/listinfo/emacs-orgmode > > > ___ > Emacs-orgmode mailing list > Please use `Reply All' to send replies to the list. > Emacs-orgmode@gnu.org > http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
On Mar 25, 2010, at 6:49 AM, Dan Davison wrote: "Eric Schulte" writes: Hi Maurizio, The ip addresses in your table are being interpreted as source/ reference names which org-babel is trying to resolve. In order to differentiate between strings and reference names, we either must surround all strings in double quotes (as below) or we must end all references with "()" and disallow any strings which end in "()". Hi Eric, Thanks for the much better answer. I think my vote goes for your second option. In other words, :var x=blockname passes the string "blockname", whereas :var x=blockname() passes the result of evaluating a block called "blockname". One argument for this is that in order to pass arguments to a block being evaluated as a reference, users are already obliged to use the parenthetic function call syntax: :var x=blockname(arg1=val1) so demanding the parentheses in the absence of arguments is natural (and perhaps even serves to remind users of the possibility of passing arguments). Also I think that users will probably pass strings more often than they will pass the results of block reference evaluations, so interpreting :var=blockname as a string literal may also be justified by Least Surprise for naive users (e.g. apparently me...). Dan Currently we are taking the former approach, which means your table will require the following to work... #+TBLNAME: system-host-ping :var host=system-hosts | name | ip | ping | |+--+| | host 1 | "192.168.10.200" | 192.168.10.200 | | host 2 | "192.168.10.24" | 192.168.10.24 | | host 3 | "192.168.42.24" | 192.168.42.24 | #+TBLFM: $3='(sbe system-ping (ip $2))' #+source: system-ping #+begin_src sh :var ip=0 # This is what I eventually want #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 #echo $? # Testing echo $ip #+end_src I'd be open to discussion on this issue. I suppose if reference resolution fails we could try using the name as a string literal, but that could lead to debugging nightmares... Cheers -- Eric Maurizio Vitale writes: In the table/block pair below, I'm trying to pass an IP number to some shell code. It seems like in the table formula I can only have numbers. Is that right? #+TBLNAME: system-host-ping :var host=system-hosts | name | ip | ping | |---++| | host 1| 192.168.10.200 | #ERROR | | host 2| 192.168.10.24 | #ERROR | | host 3| 192.168.42.24 | #ERROR | #+TBLFM: $3='(sbe system-ping (ip $2))' #+source: system-ping #+begin_src sh # This is what I eventually want #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 #echo $? # Testing echo $ip #+end_src Any way to pass arbitrary strings? Thanks a lot, Maurizio ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode Aloha all, Would it be useful to interpret arguments like this? arg -> interpretation --- "string" -> string "reference()" -> string reference -> string reference() - reference If reference resolution fails then an error could be raised unambiguously. All the best, Tom ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
> "Dan" == Dan Davison writes: Dan> Maurizio Vitale Dan> Dan> writes: >> In the table/block pair below, I'm trying to pass an IP number to >> some shell code. Dan> Hi Maurizio, Dan> I think you've forgotten to specify that 'ip' is an argument of Dan> the system-ping block. So either add e.g. :var ip=0 or use Dan> #+source: system-ping(ip=0) (You can of course use any default Dan> argument value other than 0) I used to have the argument specification. But then discovered it was working without and since I didn't have a need for a default value, I removed it. Maybe this work accidentally and it is not supported. Dan> Additionally, I'm finding that the ip column needs to be Dan> single-quoted (whether it is an IP number or a human-readable Dan> alias). I'm rushing a bit at the moment, but that looks like a Dan> bug. Dan> So in any case, this works for me (also works with Dan> single-quoted IP numbers) Thanks! Maurizio ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
> "Eric" == Eric Schulte writes: Eric> Hi Maurizio, The ip addresses in your table are being Eric> interpreted as source/reference names which org-babel is Eric> trying to resolve. In order to differentiate between strings Eric> and reference names, we either must surround all strings in Eric> double quotes (as below) or we must end all references with Eric> "()" and disallow any strings which end in "()". Currently we Eric> are taking the former approach, which means your table will Eric> require the following to work... That was a quick replay! Thanks. If I understand you, the problem is not with org-babel, but with org-mode itself expanding column references. In this case, wouldn't it be possible to consider a general "quoting" mechanism preventing that expansion? obviously "'" cannot be used, but maybe $$2 could be made to mean "threat the value literally". I'd be ok with the quotes in the source, but they look terrible in exported documents. Anyhow, I can live with the workaround you suggested. Thanks again, Maurizio ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
Hi Maurizio, Thanks for the "$$" suggestion, I think that sounds like the simplest solution. I've just applied it, so your original table should now work if you double the "$" before the column number. Dan, I think this is preferable to forcing the addition of "()" for interpretation as a reference both for reasons of backwards compatibility, and also I somehow feel that reference interpretation by default and string interpretation only in the presence of double quotes is somehow more intuitive and natural. Definitely an open area for discussion... Thanks -- Eric Maurizio Vitale writes: >> "Eric" == Eric Schulte writes: > > Eric> Hi Maurizio, The ip addresses in your table are being > Eric> interpreted as source/reference names which org-babel is > Eric> trying to resolve. In order to differentiate between strings > Eric> and reference names, we either must surround all strings in > Eric> double quotes (as below) or we must end all references with > Eric> "()" and disallow any strings which end in "()". Currently we > Eric> are taking the former approach, which means your table will > Eric> require the following to work... > > That was a quick replay! Thanks. > > If I understand you, the problem is not with org-babel, but with > org-mode itself expanding column references. In this case, wouldn't it > be possible to consider a general "quoting" mechanism preventing that > expansion? obviously "'" cannot be used, but maybe $$2 could be made to > mean "threat the value literally". > > I'd be ok with the quotes in the source, but they look terrible in > exported documents. > > Anyhow, I can live with the workaround you suggested. > Thanks again, > >Maurizio ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
"Eric Schulte" writes: > Hi Maurizio, > > The ip addresses in your table are being interpreted as source/reference > names which org-babel is trying to resolve. In order to differentiate > between strings and reference names, we either must surround all strings > in double quotes (as below) or we must end all references with "()" and > disallow any strings which end in "()". Hi Eric, Thanks for the much better answer. I think my vote goes for your second option. In other words, :var x=blockname passes the string "blockname", whereas :var x=blockname() passes the result of evaluating a block called "blockname". One argument for this is that in order to pass arguments to a block being evaluated as a reference, users are already obliged to use the parenthetic function call syntax: :var x=blockname(arg1=val1) so demanding the parentheses in the absence of arguments is natural (and perhaps even serves to remind users of the possibility of passing arguments). Also I think that users will probably pass strings more often than they will pass the results of block reference evaluations, so interpreting :var=blockname as a string literal may also be justified by Least Surprise for naive users (e.g. apparently me...). Dan > Currently we are taking the > former approach, which means your table will require the following to > work... > > #+TBLNAME: system-host-ping :var host=system-hosts > | name | ip | ping | > |+--+| > | host 1 | "192.168.10.200" | 192.168.10.200 | > | host 2 | "192.168.10.24" | 192.168.10.24 | > | host 3 | "192.168.42.24" | 192.168.42.24 | > #+TBLFM: $3='(sbe system-ping (ip $2))' > > #+source: system-ping > #+begin_src sh :var ip=0 > # This is what I eventually want > #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 > #echo $? > > # Testing > echo $ip > #+end_src > > I'd be open to discussion on this issue. I suppose if reference > resolution fails we could try using the name as a string literal, but > that could lead to debugging nightmares... > > Cheers -- Eric > > Maurizio Vitale > writes: > >> In the table/block pair below, I'm trying to pass an IP number to some >> shell code. It seems like in the table formula I can only have >> numbers. Is that right? >> >> #+TBLNAME: system-host-ping :var host=system-hosts >> | name | ip | ping | >> |---++| >> | host 1| 192.168.10.200 | #ERROR | >> | host 2| 192.168.10.24 | #ERROR | >> | host 3| 192.168.42.24 | #ERROR | >> #+TBLFM: $3='(sbe system-ping (ip $2))' >> >> #+source: system-ping >> #+begin_src sh >> # This is what I eventually want >> #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 >> #echo $? >> >> # Testing >> echo $ip >> #+end_src >> >> Any way to pass arbitrary strings? >> >> Thanks a lot, >> >>Maurizio >> >> >> >> >> ___ >> Emacs-orgmode mailing list >> Please use `Reply All' to send replies to the list. >> Emacs-orgmode@gnu.org >> http://lists.gnu.org/mailman/listinfo/emacs-orgmode > > > ___ > Emacs-orgmode mailing list > Please use `Reply All' to send replies to the list. > Emacs-orgmode@gnu.org > http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
Maurizio Vitale writes: > In the table/block pair below, I'm trying to pass an IP number to some > shell code. Hi Maurizio, I think you've forgotten to specify that 'ip' is an argument of the system-ping block. So either add e.g. :var ip=0 or use #+source: system-ping(ip=0) (You can of course use any default argument value other than 0) Additionally, I'm finding that the ip column needs to be single-quoted (whether it is an IP number or a human-readable alias). I'm rushing a bit at the moment, but that looks like a bug. So in any case, this works for me (also works with single-quoted IP numbers) | name | ip | ping | |++--| | host 1 | 'orgmode.org' |0 | | host 2 | 'xorgmode.org' |2 | #+TBLFM: $3='(sbe system-ping (ip $2)) #+source: system-ping(ip=0) #+begin_src sh ping -w 10 -c 1 -q $ip >/dev/null 2>&1 echo $? #+end_src Dan > It seems like in the table formula I can only have > numbers. Is that right? > > #+TBLNAME: system-host-ping :var host=system-hosts > | name | ip | ping | > |---++| > | host 1| 192.168.10.200 | #ERROR | > | host 2| 192.168.10.24 | #ERROR | > | host 3| 192.168.42.24 | #ERROR | > #+TBLFM: $3='(sbe system-ping (ip $2))' > > #+source: system-ping > #+begin_src sh > # This is what I eventually want > #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 > #echo $? > > # Testing > echo $ip > #+end_src > > Any way to pass arbitrary strings? > > Thanks a lot, > >Maurizio > > > > > ___ > Emacs-orgmode mailing list > Please use `Reply All' to send replies to the list. > Emacs-orgmode@gnu.org > http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
Re: [Orgmode] [babel] passing strings in
Hi Maurizio, The ip addresses in your table are being interpreted as source/reference names which org-babel is trying to resolve. In order to differentiate between strings and reference names, we either must surround all strings in double quotes (as below) or we must end all references with "()" and disallow any strings which end in "()". Currently we are taking the former approach, which means your table will require the following to work... #+TBLNAME: system-host-ping :var host=system-hosts | name | ip | ping | |+--+| | host 1 | "192.168.10.200" | 192.168.10.200 | | host 2 | "192.168.10.24" | 192.168.10.24 | | host 3 | "192.168.42.24" | 192.168.42.24 | #+TBLFM: $3='(sbe system-ping (ip $2))' #+source: system-ping #+begin_src sh :var ip=0 # This is what I eventually want #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 #echo $? # Testing echo $ip #+end_src I'd be open to discussion on this issue. I suppose if reference resolution fails we could try using the name as a string literal, but that could lead to debugging nightmares... Cheers -- Eric Maurizio Vitale writes: > In the table/block pair below, I'm trying to pass an IP number to some > shell code. It seems like in the table formula I can only have > numbers. Is that right? > > #+TBLNAME: system-host-ping :var host=system-hosts > | name | ip | ping | > |---++| > | host 1| 192.168.10.200 | #ERROR | > | host 2| 192.168.10.24 | #ERROR | > | host 3| 192.168.42.24 | #ERROR | > #+TBLFM: $3='(sbe system-ping (ip $2))' > > #+source: system-ping > #+begin_src sh > # This is what I eventually want > #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 > #echo $? > > # Testing > echo $ip > #+end_src > > Any way to pass arbitrary strings? > > Thanks a lot, > >Maurizio > > > > > ___ > Emacs-orgmode mailing list > Please use `Reply All' to send replies to the list. > Emacs-orgmode@gnu.org > http://lists.gnu.org/mailman/listinfo/emacs-orgmode ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
[Orgmode] [babel] passing strings in
In the table/block pair below, I'm trying to pass an IP number to some shell code. It seems like in the table formula I can only have numbers. Is that right? #+TBLNAME: system-host-ping :var host=system-hosts | name | ip | ping | |---++| | host 1| 192.168.10.200 | #ERROR | | host 2| 192.168.10.24 | #ERROR | | host 3| 192.168.42.24 | #ERROR | #+TBLFM: $3='(sbe system-ping (ip $2))' #+source: system-ping #+begin_src sh # This is what I eventually want #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 #echo $? # Testing echo $ip #+end_src Any way to pass arbitrary strings? Thanks a lot, Maurizio ___ Emacs-orgmode mailing list Please use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
