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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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26
Task/Strip-comments-from-a-string/ALGOL-68/strip-comments-from-a-string.alg Normal file
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#!/usr/local/bin/a68g --script #
PROC trim comment = (STRING line, CHAR marker)STRING:(
INT index := UPB line+1;
char in string(marker, index, line);
FOR i FROM index-1 BY -1 TO LWB line
WHILE line[i]=" " DO index := i OD;
line[:index-1]
);
CHAR q = """";
print((
q, trim comment("apples, pears # and bananas", "#"), q, new line,
q, trim comment("apples, pears ; and bananas", ";"), q, new line,
q, trim comment("apples, pears and bananas ", ";"), q, new line,
q, trim comment(" ", ";"), q, new line, # blank string #
q, trim comment("", ";"), q, new line # empty string #
))
CO Alternatively Algol68g has available "grep"
;STRING re marker := " *#", line := "apples, pears # and bananas";
INT index := UPB line;
grep in string(re marker, line, index, NIL);
print((q, line[:index-1], q, new line))
END CO