Display Block RegExp Regular Expressions info

[GalactusX]

Hello, I would like more information about the expressions that can be used in the display blocks, it is very difficult for those (myself included) who have never touched this programming language.

Perhaps a special command written in the block display, can display that information.

Some examples would be much help

 

[Lone_Puppy]

The Wiki updated. Display Module - StarMade Wiki
Bench has a few videos on his YouTube channel.
Have a look at the latest post. StarMade Active Development Timeline

 

[Crimson-Artist]

been trying to figure them out too. From what i've been able to gather they are a way of identifying key words. stringing them together with logic will allow you to send logic signals based on whether someone input the right words in a display module.
Regular Expression Tutorial - Learn How to Use Regular Expressions

when i know more about them i'll update the wiki

 

[Bench]

I have found this was a bit useful, well the top-left section.

Regular Expressions is a way to better control what you're searching for to replace when using REPLACEFIRST and REPLACEALL.

I've only had a bit of experience with them, will do a tutorial at some point.

 

[jayman38]

I have been learning Regular Expressions for years, mostly within the GVIM program. It has been amazingly useful to learn.

 

[Ithirahad]

For basic functions, you don't really need to know much regex. For instance, if you want a docking status thing:

[REPLACEALL]Docking Port 1: Open[WITH]Docking Port 1: Closed

Second display module:

[REPLACEALL]Docking Port 1: Closed[WITH]Docking Port 1: Open

 

[GalactusX]

I know all the new operation of the new display options, I do not understand very well the expressions regexp

 

[GalactusX]

what happen if i only want match one character in a specific position of one string line? what Regex xpresion could i use?

for example:

i want to mach if in the last position (in this case 5) is the letter "E", and replace it with "e"
HOUSE -- HOUSe

also.. the [DEL] display command, only "remove" the last character from the first line, so if i have this string "abc", the [DEL] command only do this "abc" - "ab_" - "a_ _" - "_ _ _", what happen if i want do that in reverse? "_ bc" - "_ _ c" - "_ _ _"

there are any RegEx expresion i can use?

 

[Malacodor]

what happen if i only want match one character in a specific position of one string line? what Regex xpresion could i use?

for example:

i want to mach if in the last position (in this case 5) is the letter "E", and replace it with "e"
HOUSE -- HOUSe

also.. the [DEL] display command, only "remove" the last character from the first line, so if i have this string "abc", the [DEL] command only do this "abc" - "ab_" - "a_ _" - "_ _ _", what happen if i want do that in reverse? "_ bc" - "_ _ c" - "_ _ _"

there are any RegEx expresion i can use?

I don't think that's possible.

[REPLACEFIRST]E$[WITH]e

This would work in your "HOUSE" example, but not for other positions than the end.

[REPLACEFIRST][^_][WITH]_

This would replace the first character that isn't an underscore with an underscore, but it seems to be impossible to replace something with nothing. If you replaced both underscores in the above code with a zero width space, you'd get the desired appearance, but you'd end up with an increasing number of invisible characters.

Check Wikipedia for more info.

 

[jayman38]

what happen if i only want match one character in a specific position of one string line? what Regex xpresion could i use?

for example:

i want to mach if in the last position (in this case 5) is the letter "E", and replace it with "e"
HOUSE -- HOUSe

also.. the [DEL] display command, only "remove" the last character from the first line, so if i have this string "abc", the [DEL] command only do this "abc" - "ab_" - "a_ _" - "_ _ _", what happen if i want do that in reverse? "_ bc" - "_ _ c" - "_ _ _"

there are any RegEx expresion i can use?

I haven't tested yet, but based on the RegEx page that Bench linked above, this might be worth a try:

[REPLACEFIRST]^\S{4}\G\S[WITH]e

How it is supposed to work:
The carat refers to the beginning of the line.
The backslash-S refers to any non-space character (alphanumeric, plus maybe special characters.)
The 4 sandwiched between curly-braces counts out exactly four of those non-space characters.
The backslash-G refers to a meta command to go to the end of the current match (the four non-space characters).
The backslash-S finds the fifth non-space character. This should be the only character selected at this point.
That fifth character should get replaced with "e".

Alternatively, if you do want to find an "E" at the end of the line, Malacodor's "E$" should find it.

For deleting in reverse, it may be worth a try to use the "counting" trick above.

Example to delete the first character of a line:

[REPLACEFIRST]^\S{1}[WITH][]

Note that there is nothing between the matching pair of square brackets after the "WITH" keyword. That first non-space character should simply be gone.

Example to delete the first two characters of a line:

[REPLACEFIRST]^\S{2}[WITH][]

Note that there is nothing between the matching pair of square brackets after the "WITH" keyword. Those first two non-space characters should simply be gone.

Try these out and let us know how it goes.

 

[Malacodor]

[REPLACEFIRST]^\S{1}[WITH][]

Doesn't work, "abc" becomes "[]bc".

 

[jayman38]

Doesn't work, "abc" becomes "[]bc".

Drat! Foiled again!

 

[kadzooks]

How the heck did I miss this informational goldmine?