World: r3wp
[Parse] Discussion of PARSE dialect
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Claude 20-Sep-2010 [5219] | a get number, name and msg . is that possible ? and how ? |
Maxim 20-Sep-2010 [5220] | is the data guaranteed to be rebol compatible? (you can use 'LOAD on it and it will never return an erro) |
Claude 20-Sep-2010 [5221x3] | but mystring is like this {Number : 10017 Name : Disable Message Partner Application: MXS Severity : Info Type : Alarm Event Date-Time : 20/09/10 12:39:43 GMT : Mon Sep 20 10:39:43 2010} |
i start to use => parse mystring [thru "Number :" number: to end] | |
i would like to do => parse mystring [thru "Number :" number: to "Name :" ] but this don't work !!!!] | |
Maxim 20-Sep-2010 [5224x4] | using 'TO or THRU rules is garanteed to make you life a nightmare for arbitrary string parsing, unless its very linear in content. |
isn't there a rebol string parser on rebol.org which has the basic parsing rules to filter out rebol data? | |
with a few search I didn't zero-in on it, but I seem to recall seeing that before. | |
otherwise, you can just do a line by line parsing, filtering out "keywords" at the start and then loading the data after the ":" | |
Claude 20-Sep-2010 [5228x2] | if i can't use parse i will do this |
but it is very strange. i heard that parse is very powerfull. and now i can't use it because if to difficult !!!! | |
Maxim 20-Sep-2010 [5230] | parse is very powerfull and easy to *use* but *mastering* it isn't. |
Janko 20-Sep-2010 [5231] | [thru "Number :" copy number [ to newline | to end ] ] maybe? |
Maxim 20-Sep-2010 [5232x2] | although it is much more approachable than regexp in certain ways. |
here is an overblown example, with lots of extra prints, so you can see it running... it parses your above example text. -------------------------------- rebol [] data: {Number : 10017 Name : Disable Message Partner Application: MXS Severity : Info Type : Alarm Event Date-Time : 20/09/10 12:39:43 GMT : Mon Sep 20 10:39:43 2010} ; rules token: ["Number" | "Name" | "Severity" | "Type" | "Date-Time" | "GMT" | "Application"] space: charset " ^-" spaces: [any space] content: complement charset "^/" ; all but newlines. contents: [some content] ; used as variables in the rules v-token: none v-content: none parse/all data [ some [ ( print "^/0>" ) copy v-token token ( print "1>" probe v-token ) spaces ; ignore ( print "2>" ) ":" ; end of token ( print "3>" ) spaces ; ignore ( print "4>" ) copy v-content contents ;grab all but newline ( print "5>" probe v-content ) [ ; this is important, it ensures that you've got a whole line. [some "^/"] | end ] ( print "6>" ) ( ; do something with your data here ?? v-token ?? v-content ) ] ] probe "." ask "done" | |
Claude 20-Sep-2010 [5234] | thank you i will test it and try to understand too ;-) |
Maxim 20-Sep-2010 [5235] | I made it easy for you to figure out (at least as easy as can be ;-) |
Claude 20-Sep-2010 [5236x2] | Maxim here the result |
0> 1> Number 2> . done | |
Maxim 20-Sep-2010 [5238] | using which rebol? I did run it through and it worked ok on 2.7.7 |
Claude 20-Sep-2010 [5239x2] | it stop at ":" !!! |
2.7.7.4.2 | |
Steeve 20-Sep-2010 [5241] | Much easier with R3. assuming, >> src: {Number : 10017 Name : Disable Message Partner Application: MXS Severity : Info Type : Alarm Event Date-Time : 20/09/10 12:39:43 GMT : Mon Sep 20 10:39:43 2010} then, >> construct parse copy src [return while[and[some #" " #":"] remove[some #" "]| skip]] == make object! [ Number: "10017" Name: "Disable Message Partner" Application: "MXS" Severity: "Info" Type: "Alarm Event" Date-Time: "20/09/10 12:39:43" GMT: "Mon Sep 20 10:39:43 2010" ] |
Claude 20-Sep-2010 [5242x2] | thank you steeve but i need it for a production server to parse log file for nagios |
i would prefer to use rebol 2 | |
Maxim 20-Sep-2010 [5244x4] | claude it might be because of copy/pasting... you are on linux.. did you just copy the code and paste it into the console? |
the best is to copy it to a file and run it. | |
I just (re)tried it and it does work on my system... | |
(windows xp box) | |
Claude 20-Sep-2010 [5248] | well i on linux and on linux altme do work well with ctrl-c !!!!! |
Maxim 20-Sep-2010 [5249x2] | but here we are parsing and any character code has to be loaded properly.. in theory it should work.. but it seems not... add this just before the ":" here: (probe copy/part here 20) it will print what is exactly at that point ... may provide clues as to why the ":" isn't matching... |
note: I just tried to copy/paste the above in my R2 console .. it worked ok.. | |
Claude 20-Sep-2010 [5251] | 0> 1> Number 2> : 10017^/Name . done |
Maxim 20-Sep-2010 [5252] | strange... it didn't match the spaces! |
Steeve 20-Sep-2010 [5253] | parse/all ? |
Maxim 20-Sep-2010 [5254x2] | already is using parse/all |
claude... so, did you try to run it as a script? one thing I would do... since this is a strange error is to retype this: " ^-" in your editor... to make sure its not using the wrong ascii character on your os... it should not be a problem... but there is something weird going on here. | |
Claude 20-Sep-2010 [5256] | i do a copy/paste http://host4.altme.com/altweb/rebol3/chat210.html into a file.r and i execut it . i have got the same error |
Maxim 20-Sep-2010 [5257x3] | steeve does it work for you? |
oh.. he's gone... anyone else care to test it? this is a strange bug... | |
this is what I get in my console.... 0> 1> Number 2> 3> 4> 5> 10017 6> v-token: "Number" v-content: "10017" 0> 1> Name 2> 3> 4> 5> Disable Message Partner 6> v-token: "Name" v-content: "Disable Message Partner" 0> 1> Application 2> 3> 4> 5> MXS 6> v-token: "Application" v-content: "MXS" 0> 1> Severity 2> 3> 4> 5> Info 6> v-token: "Severity" v-content: "Info" 0> 1> Type 2> 3> 4> 5> Alarm Event 6> v-token: "Type" v-content: "Alarm Event" 0> 1> Date-Time 2> 3> 4> 5> 20/09/10 12:39:43 6> v-token: "Date-Time" v-content: "20/09/10 12:39:43" 0> 1> GMT 2> 3> 4> 5> Mon Sep 20 10:39:43 2010 6> v-token: "GMT" v-content: "Mon Sep 20 10:39:43 2010" | |
Claude 20-Sep-2010 [5260] | i will try it on the server tomorrow morning (it is a windows one ;-) ) i will keep you informed |
Maxim 20-Sep-2010 [5261] | k |
Claude 20-Sep-2010 [5262] | thanks a lot for your tecahting |
Maxim 20-Sep-2010 [5263] | no eprobml ;-) |
Claude 20-Sep-2010 [5264x2] | teaching |
;-) | |
Anton 20-Sep-2010 [5266] | Maxim, your first big code works for me on Linux R2. |
Maxim 20-Sep-2010 [5267] | ok, so its definitely somethings screwy with his c&p on that system |
Anton 20-Sep-2010 [5268] | That is a distinct possibility. |
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