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In this Discussion
Need help matching.
Vayne
Rhode Island
in Client Help
Basically, I'm trying to make an alias that allows me to either transmute all my chemicals on hand or a certain amount. Where I am stuck is with matching the regex with proper variables.
pattern:
^synth (.+) (.+)$
That is the pattern I have now. The first variable being the metal I want to synthesise and the second being the amount. The script is an if argument that is supposed to synth them all if matches[3] == nil and synth however many it is equal to otherwise. However, the pattern doesn't match if I just leave the second variable blank on the line (ex. synth tin). Obviously, I am not doing it right and was wondering if anyone could please tell me how or if I can either match nothing or a string like that. Thanks!
pattern:
^synth (.+) (.+)$
That is the pattern I have now. The first variable being the metal I want to synthesise and the second being the amount. The script is an if argument that is supposed to synth them all if matches[3] == nil and synth however many it is equal to otherwise. However, the pattern doesn't match if I just leave the second variable blank on the line (ex. synth tin). Obviously, I am not doing it right and was wondering if anyone could please tell me how or if I can either match nothing or a string like that. Thanks!
0
Comments
^synth (\w+)(?: (\d+))?$
The \w+ will match any set of alphanumeric characters (the name of the metal) and the \d+ will match any set of digits. The final ? makes everything in the preceding set of parentheses (i.e., the " (\d+)" part) optional, and the ?: at the beginning of that set of parentheses prevents it from being counted as a capture group. So what you're left with is "synth " followed by a word, optionally followed by another space and a number. The word is matches[2] and the number is matches[3], as with your original.