Yep. Those are improvements.

On Monday, August 26, 2019 at 8:12:54 AM UTC-7, Mohammad wrote:
>
> Please see this suggestion:
>
>
>    - tiddler starts with capital letter: ^[A-Z]   instead of ^[A-Z].*$
>    - tiddler starts with digits: ^[0-9] instead of ^[0-9].*$
>
>
> What do you think?
>
> --Mohammad
>
> On Sunday, August 25, 2019 at 11:36:08 PM UTC+4:30, Mark S. wrote:
>>
>> Most of your examples have an implied scope of the entire tiddler title.
>>
>> That is, if the tiddler can only have lower case letters, then *every 
>> single character* from start to end (^ to $) has to be lowercase.
>>
>> But duplicate words can start and end anywhere inside the title, so the 
>> scope doesn't have to apply to every single character.
>>
>> So, it was my fault for churning them out *en masse*, using previous 
>> versions as my template ;-) 
>>
>> Thanks!
>>
>> On Sunday, August 25, 2019 at 11:44:56 AM UTC-7, Mohammad wrote:
>>>
>>> Thanks Mark and Josiah,
>>>  It seems the problem is with *^$*.
>>>
>>> I removed them and it works. But not sure where they  are required.
>>>
>>> @Josiah,
>>>  I add the consecutive duplicate words!
>>>
>>> Thank you again
>>>
>>> --Mohammad
>>>
>>> On Sunday, August 25, 2019 at 10:34:13 PM UTC+4:30, @TiddlyTweeter wrote:
>>>>
>>>> Mohammad 
>>>>
>>>> I'm not sure how much spaced repetition is an issue really ("I had an 
>>>> old an clock")? The commonest issue is simple sequential repeating ("I had 
>>>> an an ...").
>>>>
>>>> But Mark's regex works on test data. Though I'd simplify it to ...
>>>>
>>>> (\b\w{2,}\b)(.*)\1
>>>>
>>>> Example match in test data (match in lines)...
>>>>
>>>> *-> ... <- is match*
>>>>
>>>> (\b\w{2,}\b)(.*)\1 ... spaced duplicate words to remove↩︎
>>>> ↩︎
>>>> This is a Tiddler ->This<- is Nice↩︎
>>>> Nice Tiddler is This ->Tiddler<-↩︎
>>>> Remove this repeat of ->this<- Tiddler repeat of ->repeat<-.↩︎
>>>>
>>>>
>>>> TT
>>>>
>>>> On Sunday, 25 August 2019 17:29:10 UTC+2, Mohammad wrote:
>>>>>
>>>>> The duplicate words does not work!
>>>>>
>>>>> It seems only if the first word of title repeated it will be matched. 
>>>>> Look at the below two tiddler titles
>>>>>
>>>>>
>>>>>    1. This is a Tiddler This is Nice
>>>>>    2. Nice Tiddler is This Tiddler
>>>>>
>>>>> The pattern will match the first but ignore the second while both have 
>>>>> a duplicate word!
>>>>>
>>>>> --Mohammad
>>>>>
>>>>> On Friday, August 23, 2019 at 10:51:06 PM UTC+4:30, Mark S. wrote:
>>>>>>
>>>>>> Ok, with duplicates and date formats. Note that the date formats only 
>>>>>> check for the format. You could still create
>>>>>> nonsensical dates that actually match the formats (Jan 55 9999, 
>>>>>> 1111.15.55). Actual validation of dates would take
>>>>>> real code massaging.
>>>>>>
>>>>>> <$vars digonly="^[0-9]*$">
>>>>>> <$vars useme=<<digonly>>>
>>>>>> </$vars>
>>>>>> </$vars>
>>>>>>
>>>>>> <$select tiddler="myregexp">
>>>>>> <option value="^[0-9]*$">Only digits</option>
>>>>>> <option value="^[a-z]*$">Only lower case</option>
>>>>>> <option value="^[A-Z]*$">Only upper case</option>
>>>>>> <option value="^[\w-_]*$">Only alphanumeric, _, and -</option>
>>>>>> <option value="^[\w]{3,15}$">Only alphanum len 3-15</option>
>>>>>> <option value="^[A-Z]+.*$">Starts with capital</option>
>>>>>> <option value="^[0-9]+.*$">Starts with digit</option>
>>>>>> <option value="^.+\.[a-zA-Z]{3,4}$">Extensions only</option>
>>>>>> <option value="^.+(\.jpg|\.gpeg)$">Extension jpg gpeg</option>
>>>>>> <option value="^\b(\w{2,})\b.*\b\1\b.*$">Duplicate words</option>
>>>>>> <option value="^\b(\w{2,})\b.*\b\1\b.*$">Duplicate words</option>
>>>>>> <option value=
>>>>>> "^(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s{1}\d{2}\s\d{4}$"
>>>>>> >Date like Jan 06 2019</option>
>>>>>> <option value="^\d{4}\.[0-1]\d\.[0-3]\d$">Date like 2019.08.25
>>>>>> </option>
>>>>>> </$select>
>>>>>>
>>>>>> <$list filter="[regexp{myregexp}sort[]]">
>>>>>>
>>>>>> </$list>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Friday, August 23, 2019 at 12:11:07 AM UTC-7, Mohammad wrote:
>>>>>>>
>>>>>>> I am looking for examples and use cases of regexp in Tiddlywiki!
>>>>>>> Those can be done current filter operators like prefix, search,... 
>>>>>>> are not recommend to be done with regexp.
>>>>>>>
>>>>>>> I appreciate your help, case and examples on this. Just give what 
>>>>>>> you want to do.
>>>>>>>
>>>>>>> Some case
>>>>>>>
>>>>>>> Give a regexp pattern in Tiddlywiki to match all tiddlers name are
>>>>>>>
>>>>>>>
>>>>>>>    1. only digits
>>>>>>>    2. only lowercase letters
>>>>>>>    3. only uppercase letters
>>>>>>>    4. only alphanumeric and underscore and hyphen
>>>>>>>    5. only alphanumeric with length between 3 and 15
>>>>>>>    6. start with a capital letter
>>>>>>>    7. start with a digit
>>>>>>>    8. have a extension like mytiddler.ext
>>>>>>>    9. have jpg or jpeg extension like *mytiddler.jpg* or 
>>>>>>>    *mytiddler.gpeg*
>>>>>>>    10. are a date in format like Jan 06 2019 
>>>>>>>    11. are a date in format like 2019.08.25 
>>>>>>>    12. have duplicate words
>>>>>>>    13. have a valid url
>>>>>>>    14. 
>>>>>>>    
>>>>>>>
>>>>>>> [This list will grow by more examples]
>>>>>>>
>>>>>>>
>>>>>>> Please give your use case.
>>>>>>>
>>>>>>> -- Mohammad
>>>>>>>
>>>>>>>

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