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YAPC::EU 2018 Glasgow Update!

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Ingy döt Net 2018-08-17 15:15:24 +01:00
parent 22f33d4004
commit 4e2d22a71d
1170 changed files with 15042 additions and 3047 deletions
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24
Task/Strip-comments-from-a-string/Forth/strip-comments-from-a-string-1.fth Normal file
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\ Rosetta Code Strip Comment
: LASTCHAR ( addr len -- addr len c) 2DUP + 1- C@ ;
: COMMENT? ( char -- ? ) S" #;" ROT SCAN NIP ; \ is char '#' or ';'
: -COMMENT ( addr len -- addr len') \ removes # or ; comments
BEGIN
LASTCHAR COMMENT? 0=
WHILE \ while not a comment char...
1- \ reduce length by 1
REPEAT
1- ; \ remove 1 more (the comment char)
\ -TRAILING is resident in desktop Forth systems like Swift Forth
\ shown here for demonstration
: -TRAILING ( adr len -- adr len') \ remove trailing spaces
BEGIN
LASTCHAR BL =
WHILE \ while lastchar = blank char
1- \ reduce length by 1
REPEAT ;
: COMMENT-STRIP ( addr len -- addr 'len) -COMMENT -TRAILING ;

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Task/Strip-comments-from-a-string/Forth/strip-comments-from-a-string-2.fth Normal file
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S" apples, pears # and bananas" COMMENT-STRIP TYPE apples, pears ok
S" apples, pears ; and bananas" COMMENT-STRIP TYPE apples, pears ok