Find the last occurence before a condition
I’m a new user of notepad++ regex so I don’t know the most advanced feature.
My code is something like( from a gcode of a cnc machine):
(bunch of lines)
I need either to have the cursor at the T3 M06 before the word Turn or to have the search which includes from the T3 M06 until Turn.
All the number after the letter T are random and so the number of times the word Turn is written, it couldn’t be at all; I need to be in regex so the code I need to apply can be used everytime
the word Turn is used.
Sorry about any grammatical mistake.
Thanks in advance
Given the possible example text, below :
T11 M06 Line 2 Line 3 Line 4 T3 M06 Line 6 Line 7 Line 8 Turn Line 10 Line 11 Line 12 Line 13 Turn Line 15 Line 16 Line 17 T7 M06 Line 19 Line 20 Line 21
Now let’s suppose that :
The cursor is located before the upper letter T of the header T11 M06, at beginning of the text. Do you want to :
- Select the range, from the header T11 M06, till Line 4, included, before the next header T3 M06
- Select the range, from the header T11 M06, till the first string Turn, at line 9
- Select the range, from the header T11 M06, till the last string Turn, at line 14
- Select the range, from the header T11 M06, till the last line 21
The cursor is located before the upper letter T of the header T3 M06. Do you want to :
- Select the range, from the header T3 M06, till the first string Turn, at line 9
- Select the range, from the header T3 M06, till the last string Turn, at line 14
- Select the range, from the header T3 M06, till Line 17, before the next header T7 M06
- Select the range, from the header T3 M06, till the last line 21
The cursor is located before the upper letter T of the header T7 M06. I suppose that you want to select the range from the header T7 M06 till the last line 21 of the file, despite of the absence of an other command Turn, wouldn’t you ?
See you later, for your additional information ! Be sure that there’s (almost) always a solution when dealing with regular expressions :-))
Two more questions :
Is the command Turn should be included or excluded, from the selected range ?
May be, would you prefer that the search process places the cursor on specific locations, in your text ?
Sorry if my post was confusing.
I wanted at the end a way to select only the letter T, followed by the number, but only the one before the word turn and not the others.
I write a post here because once I’ll find a way to find that letter I’m using another regex code;
using the normal search is not ideal becuase I wanted my code to be useful every time the word turn is written.
I hope it’s explained it better now.
OK, I think I got it !
Given your original text, below :
T11 M06 (bunch of lines) T3 M06 (lines) Turn (lines) T7 M06 (lines)
You would like to search, ONLY, for the range :
because it’s the only range, which is followed by the word Turn ?
Just tell me if I’m right about it !
In that case, do you want :
- The cursor located just before the string T3
- The string T3 selected, only
- The string T3 M06 selected, only
- The bunch of lines between T3 M06 and Turn selected, exclusively
- The bunch of lines T3 M06 … Turn
Hi thank you for your answer.
Anything than can move the cursor on the letter t3 or select it.
Just to clarify the word turn can be more than once and every time I want the letter T+numer just before that; the bunch of lines are mostly the same and can’t be used for selection because there’s no way to distinguish those in first section or in the last.
Thanks in advance.
Sorry for my late answer, but I was just eating a bit !
I look quite “slow” to understand exactly what you need, but we’ll get the right solution, in the end :-)
So, could it be that you would change the range of lines :
T3 M06 (lines) Turn
into the range A :
T3 M06 (lines) T3 Turn
or, may be, into the range B :
T3 M06 (lines) T3 M06 Turn
See you later,
I’m definitely bad at explain myself.
I’ll explain my problem in another way:
I have this code:
I want to select ,once at a time, only the t before s with the search regex.
Waouuuuuuh ! This time it’s the good one :-)
From your last example, I would say :
Place your cursor, before the part of text to scan
Open the Find dialog ( CTRL + F )
Select the Regular expression search mode
Write, in the Find what zone, the regex
Finally, click, several times of the Find Next button
Et voilà !
This regex will select any letter t, located at the end of a line, ONLY IF it is followed by a letter s, at the beginning of the next line :-)
\Rstands for any End of Line characters (
\r\nin Windows files,
\nin Unix/OSX files or
\rin old MAC files )
(?=....)is called a look-around and more exactly, a condition called a positive look-ahead. The string written inside (
\Rs) must be present, after the letter
t, for the regex engine detects a positive match, although it is NEVER part of the final match, which is, only, the letter
Generally speaking, the global form (regex A|string A|character A)(?=(regex B|string B|character B)) tries to match regex A or string A or character A, ONLY IF it’s immediately followed by, either, the regex B, or string B or character B !
Feel free to ask me for a narrowed solution !
You’ll find good documentation, about the new Boost C++ Regex library, v1.55.0 ( similar to the PERL Regular Common Expressions, v1.48.0 ), used by
Notepad++, since its
6.0version, at the TWO addresses below :
The FIRST link explains the syntax, of regular expressions, in the SEARCH part
The SECOND link explains the syntax, of regular expressions, in the REPLACEMENT part
We may, also, look for valuable information, on the sites, below :
To end with, you may ask, the N++ Community, for infos on any tricky regex that you came across OR for building any tricky regex, for a particular purpose :-))
Thank you for your time and your answers.
I’ll try to make it work; I don’t know how to mark this topic as solved by the way.