I've updated my GitHub to the following, which adopts Brian's "starts with"
(I can't count how many times I've had to re-remember that "starts with" is
faster than comparing to char 1 through <whatever>) and added minor
optimizations to the wrapping-up code.
gc
function allOffsets D,S,pCase,pNoOverlaps
-- returns a comma-delimited list of the offsets of D in S
set the caseSensitive to pCase is true
put length(D) into dLength
put pNoOverlaps and dLength > 1 into pNoOverlaps
put numtochar(chartonum(char -1 of D) mod 2 + 1) after S
if not pNoOverlaps then
repeat with i = 1 to dLength - 1
if not (char i + 1 to -1 of D is char 1 to dLength - i of D) then
next repeat
put char -i to -1 of D into OV[i]
put i & cr after kList
end repeat
end if
set the itemDel to D
put 1 - dLength into C
if pNoOverlaps or kList is empty then
repeat for each item i in S
add length(i) + dLength to C
put C,"" after R
end repeat
else
repeat for each item i in S
repeat for each line K in kList
if i & D begins with OV[K] then put (C + K),"" after R
end repeat
add length(i) + dLength to C
put C,"" after R
end repeat
end if
set the itemDel to comma
repeat with i = 1 to 99999999999
if item i of R > 0 then exit repeat
end repeat
delete item 1 to i - 1 of R
if R begins with C then return 0
return char 1 to -3 - length(C) of R
end allOffsets
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