Regular Expresion Search not working at end of string

[isidro]

Want to delete all DE-de*.* files/folder, except DE-def*.* or DE-dea*, ie: "DE-define", "DE-de", "DE-de dict", "DE-dea" should return: "DE-de", "DE-de dict"
My regular expresion search is: DE-de[^af] which works in textpad, even if "DE-De" is alone in a line, but doesn't work on TotalCommander:
"DE-de" is NOT matched. I do have lot of similar searches with same problem...
Is there a workaround to make that search?

[petermad]

Have you tried: DE-de($|[^af])

[Dalai]

Can't tell why the negated class doesn't find/match the line end, but

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de-de($|[^af])

works for your example.

Regards
Dalai

[white]

My regular expresion search is: DE-de[^af] which works in textpad, even if "DE-De" is alone in a line...

No, it doesn't. Try "DE-De" on the last line of a file.

Is there a workaround to make that search?

You can use the expression given by the other users, or following your line of thinking, you can do a Negative Lookahead search:

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DE-de(?![af])

Can't tell why the negated class doesn't find/match the line end, but

[ ] denotes a Character class. So it matches a character, which can also be a newline character. There is no newline character in filenames.
In contrast, $ denotes a line or string boundary.

[isidro]

You can use the expression given by the other users, or following your line of thinking, you can do a Negative Lookahead search:

That works great, thanks for the explanation. RE is a whole new world.

[white]

Moderator message from: white » 2023-03-04, 15:05 UTC

Moved from Bugs forum to English forum.

[isidro]

actually I'm trying to find all regional non english files, adding some exceptions of non regional files; my full expression gives error "lookaround brackets must be at the very begining/ending":

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ar_ae|ar_sa(?![b])|az_az|ba_ba|be_by|bg_bg|bn_bd|ca_ca|(ca|eu|gl|va)_es|cn_sc|cn_tc|cs_cz|cz_cz|da_dk|de_(ch|de)(?![af])|el_gr(?![o])|en_(ae|au|ca|gb|il|xc|xm)|es_as|et_ee|fa_ir|fi_fi|fil_ph|fr_(be|br|ca|fr|ma|mx|xm)|gd_gb|he_il|hi_in|hr_hr|hu_hu|hy_am|id_id|in_in(?![fli])|is_is(?![a])|it_it|ja_jp|jp_jp|ka_ge|kk_kz|ko_kr|lt_lt|lv_lv|mk_mk|mk_yu|mn_mn|mt_mt|(nb|nn|no)_no|nl_nl|pa_in|pl_pl(?![a])|pt_br|pt_pt|ro_ro|ru_ru|sh_yu|sk_sk|sl_si|slo_slo|sq_al|sr_(cs|cir|sp|yu)|sv_(fi|se|sv)|th_th(?![e])|tl_ph|tr_tr|ua_ua|ug_cn|uk_ua|vi_vn|zh_chs|zh_(cht|cn|hk|mo|sg|tw)

Something simpler also gives the error:

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ar_ae|ar_sa(?![b])|az_az

This succeeds:

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ar_ae|ar_sa(?![b])

In textpad all works with no errors, any idea of why it doesn't work here?

[Ovg]

https://regex.sorokin.engineer/en/latest/regular_expressions.html?highlight=lookbehind#assertions

"...... Brackets for lookahead must be at the very ending of expression, and brackets for lookbehind must be at the very beginning. So assertions between choices |, or inside groups, are not supported. ....."

Try to use Everything (www.voidtools.com) with TC

[isidro]

Try to use Everything (www.voidtools.com) with TC

"Everything" program would be better if it could manage to use internal windows Search database instead of adding another service and database for same task. Anyways, I hate things running in background so "Everything" is not an option. I even have Search service disabled among hundreds of other things (check my optimwin-batch in sourceForge which I will update soon).

Working solution is using first suggested solution ($|[^xyz]):

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ar_ae|ar_sa|az_az|ba_ba|be_by|bg_bg|bn_bd|ca_ca|(ca|eu|gl|va)_es|cn_sc|cn_tc|cs_cz|cz_cz|da_dk|de_(ch|de)($|[^af])|el_gr($|[^o])|en_(ae|au|ca|gb|il|xc|xm)|es_as|et_ee|fa_ir|fi_fi|fil_ph|fr_(be|br|ca|fr|ma|mx|xm)|gd_gb|he_il|hi_in|hr_hr|hu_hu|hy_am|id_id|in_in($|[^fli])|is_is($|[^a])|it_it|ja_jp|jp_jp|ka_ge|kk_kz|ko_kr|lt_lt|lv_lv|mk_mk|mk_yu|mn_mn|mt_mt|(nb|nn|no)_no|nl_nl|pa_in|pl_pl($|[^a])|pt_br|pt_pt|ro_ro|ru_ru|sh_yu|sk_sk|sl_si|slo_slo|sq_al|sr_(cs|cir|sp|yu)|sv_(fi|se|sv)|th_th($|[^e])|tl_ph|tr_tr|ua_ua|ug_cn|uk_ua|vi_vn|zh_chs|zh_(cht|cn|hk|mo|sg|tw)

And same with upper - instead of underscore _ for other cases:

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ar-ae|ar-sa|az-az|ba-ba|be-by|bg-bg|bn-bd|ca-ca|(ca|eu|gl|va)-es|cn-sc|cn-tc|cs-cz|cz-cz|da-dk|de-(ch|de)($|[^af])|el-gr($|[^o])|en-(ae|au|ca|gb|il|xc|xm)|es-as|et-ee|fa-ir|fi-fi|fil-ph|fr-(be|br|ca|fr|ma|mx|xm)|gd-gb|he-il|hi-in|hr-hr|hu-hu|hy-am|id-id|in-in($|[^fli])|is-is($|[^a])|it-it|ja-jp|jp-jp|ka-ge|kk-kz|ko-kr|lt-lt|lv-lv|mk-mk|mk-yu|mn-mn|mt-mt|(nb|nn|no)-no|nl-nl|pa-in|pl-pl($|[^a])|pt-br|pt-pt|ro-ro|ru-ru|sh-yu|sk-sk|sl-si|slo-slo|sq-al|sr-(cs|cir|sp|yu)|sv-(fi|se|sv)|th-th($|[^e])|tl-ph|tr-tr|ua-ua|ug-cn|uk-ua|vi-vn|zh-chs|zh-(cht|cn|hk|mo|sg|tw)

[Ovg]

"Everything" program would be better if it could manage to use internal windows Search database ......

Everything 1.5 working with Windows Search just fine ....

[isidro]

"Everything" program would be better if it could manage to use internal windows Search database ......

Everything 1.5 working with Windows Search just fine ....

I didn't said it doesn't, what I meant is I don't like having two programs running to do the same task. Everything would be better if instead of having it's own Database and Service, would use the already running windows Search Service and database and save resources. In some limited machines I even disable Windows Search Service to gain some speed.

[tuska]

"Everything" program would be better if it could manage to use internal windows Search database ......

Everything 1.5 working with Windows Search just fine ....

... Everything would be better if instead of having it's own Database and Service,
would use the already running windows Search Service and database and save resources.

In my opinion, the Everything Service does not need to be mentioned in this context,
because it only needs between 1.2 and 1.4 MB RAM.

You can also keep the database (Everything.db) small if you do not use the options "Properties" and "Content"
in Everything 1.5a and instead define these settings in Windows Search.

Access to the Windows search in Everything is possible with the parameter: si:
and in Total Commander with the parameter: ev:si:.

See also:
- Content & Properties in Everything 1.5a - My Settings - Example
- 14. Windows Search in Total Commander and 'Everything'

[isidro]

In my opinion, the Everything Service does not need to be mentioned in this context,
because it only needs between 1.2 and 1.4 MB RAM.

Problem is not only RAM (and I seriously doubt so little usage with >300k files in a small win10 (only one monthly update will leave >100k useless files&folders in Windows\Servicing\LCU folder). But also the overhead on file operations due to multiple index updates. On old mechanic HDs this will result in slower operation. My approach is to avoid unnecessary background programs, ideally none. XP was a lot better in that aspect, since win7 MS started bloated taskscheduler with >100 useless tasks, etc.