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EXAKT Regular Expressions

EXAKT Regular Expressions. Content. Regular Expressions Examples Metasymbols and syntax. Regular Expressions. Patterns for describing sets of symbol strings with the help of meta symbols and a predefined syntax Purpose: find strings in larger strings / texts. Examples.

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EXAKT Regular Expressions

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  1. EXAKT Regular Expressions

  2. Content Regular Expressions Examples Metasymbols and syntax

  3. Regular Expressions Patterns for describing sets of symbol strings with the help of meta symbols and a predefined syntax Purpose: find strings in larger strings / texts

  4. Examples The words this, that, those and these and their capitalized variants [Tt]h(is|at|ose|ese) Words starting with in and ending in able or ably (e.g. indisputable, indescribably, ineffable, indistinguishable etc.) \bin[a-z]+abl[ey]\b All sequences of three words followed by a question mark, i.e. the last three words of questions (\b[A-Za-z]+\b){3,3}\?

  5. Meta symbols and syntax Examples: B[ui]rma matches „Burma“ and „Birma“ M[ae][iy]er  matches „Maier“, „Mayer“, „Meyer“, „Meier“, Symbols and symbol classes:

  6. Meta symbols and syntax Important!!! \w  matches letters of the English alphabet, no extensios of the Latin alphabet Instead: [A-Za-zÄäÖöÜüß]for the German alphabet Predefined symbol classes (selection):

  7. Meta symbols and syntax Examples: [A-K]\w+  matches words with capital initial A-K \d{1,2}\.\d{1,2}\.\d{2,4}  matches dates (14.11.1971) Quantifiers:

  8. Meta symbols and syntax Beispiele: \.  matches a period [Dd](er|ie|as)  matches German definite articles [a-z0-9-_\.]+@[a-z0-9-_\.]+\.\w{2,3}  matches email adresses Other metasymbols (selection):

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