Simply add 1 to the last offset pointer. If after the first iteration you return 1, then set the charsToSkip to 2 instead of offset + len(searchString) if you take my meaning.
Bob S > On Nov 2, 2018, at 17:43 , Geoff Canyon via use-livecode > <use-livecode@lists.runrev.com> wrote: > > I like that, changing it. Now available at > https://github.com/gcanyon/alloffsets > > One thing I don't see how to do without significantly impacting performance > is to return all offsets if there are overlapping strings. For example: > > allOffsets("aba","abababa") > > would return 1,5, when it might be reasonable to expect it to return 1,3,5. > Using the offset function with numToSkip would make that easy; adapting > allOffsets to do so would be harder to do cleanly I think. > > gc > > On Fri, Nov 2, 2018 at 12:17 PM Bob Sneidar via use-livecode < > use-livecode@lists.runrev.com> wrote: > >> how about allOffsets? >> >> Bob S >> >> >>> On Nov 2, 2018, at 09:16 , Geoff Canyon via use-livecode < >> use-livecode@lists.runrev.com> wrote: >>> >>> All of those return a single value; I wanted to convey the concept of >>> returning multiple values. To me listOffset implies it does the same >> thing >>> as itemOffset, since items come in a list. How about: >>> >>> offsets -- not my favorite because it's almost indistinguishable from >> offset >>> offsetsOf -- seems a tad clumsy >>> >>> On Fri, Nov 2, 2018 at 7:41 AM Bob Sneidar via use-livecode < >>> use-livecode@lists.runrev.com> wrote: >>> >>>> It probably should be named listOffset, like itemOffset or lineOffset. >>>> >>>> Bob S >>>> >>>> >>>>> On Nov 1, 2018, at 17:04 , Geoff Canyon via use-livecode < >>>> use-livecode@lists.runrev.com> wrote: >>>>> >>>>> Nice! I *just* finished creating a github repository for it, and adding >>>>> support for multi-char search strings, much as you did. I was coming to >>>> the >>>>> list to post the update when I saw your post. >>>>> >>>>> Here's the GitHub link: https://github.com/gcanyon/offsetlist >>>>> >>>>> Here's my updated version: >>>>> >>>>> function offsetList D,S,pCase >>>>> -- returns a comma-delimited list of the offsets of D in S >>>>> set the caseSensitive to pCase is true >>>>> set the itemDel to D >>>>> put length(D) into dLength >>>>> put 1 - dLength into C >>>>> repeat for each item i in S >>>>> add length(i) + dLength to C >>>>> put C,"" after R >>>>> end repeat >>>>> set the itemDel to comma >>>>> if char -dLength to -1 of S is D then return char 1 to -2 of R >>>>> put length(C) + 1 into lenC >>>>> put length(R) into lenR >>>>> if lenC = lenR then return 0 >>>>> return char 1 to lenR - lenC - 1 of R >>>>> end offsetList >>>>> >>>>> On Thu, Nov 1, 2018 at 8:28 AM Niggemann, Bernd via use-livecode < >>>>> use-livecode@lists.runrev.com> wrote: >>>>> >>>>>> Hi Geoff, >>>>>> >>>>>> thank you for this beautiful script. >>>>>> >>>>>> I modified it a bit to accept multi-character search string and also >> for >>>>>> case sensitivity. >>>>>> >>>>>> It definitely is a lot faster for unicode text than anything I have >>>> seen. >>>>>> >>>>>> ----------------------------- >>>>>> function offsetList D,S, pCase >>>>>> -- returns a comma-delimited list of the offsets of D in S >>>>>> -- pCase is a boolean for caseSensitive >>>>>> set the caseSensitive to pCase >>>>>> set the itemDel to D >>>>>> put the length of D into tDelimLength >>>>>> repeat for each item i in S >>>>>> add length(i) + tDelimLength to C >>>>>> put C - (tDelimLength - 1),"" after R >>>>>> end repeat >>>>>> set the itemDel to comma >>>>>> if char -1 of S is D then return char 1 to -2 of R >>>>>> put length(C) + 1 into lenC >>>>>> put length(R) into lenR >>>>>> if lenC = lenR then return 0 >>>>>> return char 1 to lenR - lenC - 1 of R >>>>>> end offsetList >>>>>> ------------------------------ >>>>>> >>>>>> Kind regards >>>>>> Bernd >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>>> >>>>>>> Date: Thu, 1 Nov 2018 00:15:37 -0700 >>>>>>> From: Geoff Canyon >>>>>>> To: How to use LiveCode <use-livecode@lists.runrev.com> >>>>>>> Subject: Re: How to find the offset of the last instance of a >>>>>>> repeating character in a string? >>>>>>> >>>>>>> I was curious if using the itemDelimiter might work for this, so I >>>> wrote >>>>>>> the below code out of curiosity; but in my quick testing with >>>> single-byte >>>>>>> characters it was only about 30% faster than the above methods, so I >>>>>> didn't >>>>>>> bother to post it. >>>>>>> >>>>>>> But Ben Rubinstein just posted about a terrible slow-down doing >> pretty >>>>>> much >>>>>>> this same thing for text with unicode characters. So I ran a simple >>>> test >>>>>>> with 8000 character long strings that start with a single unicode >>>>>>> character, this is about 15x faster than offset() with skip. For >>>>>>> 100,000-character lines it's about 300x faster, so it seems to be >>>> immune >>>>>> to >>>>>>> the line-painter issues skip is subject to. So for what it's worth: >>>>>>> >>>>>>> function offsetList D,S >>>>>>> -- returns a comma-delimited list of the offsets of D in S >>>>>>> set the itemDel to D >>>>>>> repeat for each item i in S >>>>>>> add length(i) + 1 to C >>>>>>> put C,"" after R >>>>>>> end repeat >>>>>>> set the itemDel to comma >>>>>>> if char -1 of S is D then return char 1 to -2 of R >>>>>>> put length(C) + 1 into lenC >>>>>>> put length(R) into lenR >>>>>>> if lenC = lenR then return 0 >>>>>>> return char 1 to lenR - lenC - 1 of R >>>>>>> end offsetList >>>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> use-livecode mailing list >>>>>> use-livecode@lists.runrev.com >>>>>> Please visit this url to subscribe, unsubscribe and manage your >>>>>> subscription preferences: >>>>>> http://lists.runrev.com/mailman/listinfo/use-livecode >>>>>> >>>>> _______________________________________________ >>>>> use-livecode mailing list >>>>> use-livecode@lists.runrev.com >>>>> Please visit this url to subscribe, unsubscribe and manage your >>>> subscription preferences: >>>>> http://lists.runrev.com/mailman/listinfo/use-livecode >>>> >>>> >>>> _______________________________________________ >>>> use-livecode mailing list >>>> use-livecode@lists.runrev.com >>>> Please visit this url to subscribe, unsubscribe and manage your >>>> subscription preferences: >>>> http://lists.runrev.com/mailman/listinfo/use-livecode >>>> >>> _______________________________________________ >>> use-livecode mailing list >>> use-livecode@lists.runrev.com >>> Please visit this url to subscribe, unsubscribe and manage your >> subscription preferences: >>> http://lists.runrev.com/mailman/listinfo/use-livecode >> >> >> _______________________________________________ >> use-livecode mailing list >> use-livecode@lists.runrev.com >> Please visit this url to subscribe, unsubscribe and manage your >> subscription preferences: >> http://lists.runrev.com/mailman/listinfo/use-livecode >> > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
