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| kb:zapisi:regex_main [2023/08/16 08:58] – [Pohlepni i lenji se poklapaju] milano | kb:zapisi:regex_main [2023/08/16 09:07] – [Back-references — 1] milano |
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| ====== Advanced topics ====== | ====== Napredne teme ====== |
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| ===== Boundaries — b and B ===== | ===== Granice — b i B ===== |
| ''\babc\b'' performs a **"whole words only"** search \\ \\ | ''\babc\b'' vrši **"samo cele reči"** pretragu \\ \\ |
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| ''\b'' represents an **anchor like caret** (it is similar to ''$'' and ''^'') matching positions where **one side** is a word character (like ''\w'') and the **other side** is not a word character (for instance it may be the beginning of the string or a space character). | ''\b'' predstavlja **sidro kao karet** (slično je kao ''$'' i ''^'') odgovarajućim pozicijama gde je **jedna strana** karakter reči (kao ''\ v''), a **druga strana** nije karakter reči (na primer, može biti početak stringa ili razmak). |
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| It comes with its **negation**, ''\B''. This matches all positions where ''\b'' doesn’t match and could be if we want to find a search pattern fully surrounded by word characters. | Dolazi sa svojom **negacijom**, ''\B''. Ovo se poklapa sa svim pozicijama na kojima se ''\b'' ne podudara i može biti ako želimo da pronađemo obrazac pretrage u potpunosti okružen znakovima reči. |
| ''\Babc\B'' matches only if the pattern is **fully surrounded** by word characters. | ''\Babc\B'' se podudara samo ako je obrazac **potpuno okružen** znakovima reči. |
| | ===== Povratne reference — 1 ===== |
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| ===== Back-references — 1 ===== | ''([abc])\1'' koristeći ''\1'' odgovara **istom** tekstu koji je upario **prva grupa za snimanje**. \\ |
| | ''([abc])([de])\2\1'' možemo da koristimo ''\2'' (3, 4, itd.) da identifikujemo **isti** tekst koji je **podudarala druga** (treća, četvrta, itd.) grupa za snimanje. \\ |
| ''([abc])\1'' using ''\1'' it matches **the same** text that was matched by the **first capturing group**. \\ | ''(?<foo>[abc])\k<foo>'' grupi stavljamo ime ''foo'' i referenciramo ga kasnije (''k<foo>''). Rezultat je isti kao prvi regularni izraz. |
| ''([abc])([de])\2\1'' we can use ''\2'' (3, 4, etc.) to identify **the same** text that **was matched by the second** (third, fourth, etc.) capturing group. \\ | |
| ''(?<foo>[abc])\k<foo>'' we put the name ''foo'' to the group and we reference it later (''k<foo>''). The result is the same of the first regex. | |
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