Co to jest REGULAR EXPRESSION
REGULAR EXPRESSION co to jest
Co znaczy A way of expressing a text pattern for matching purposes? Definicja regular expression.

Akronim regular expression co to znaczy

Definicja A way of expressing a text pattern for matching purposes: regular expression A regular expression is a way of expressing a text pattern for the purpose of matching a string. Regular expressions are often used either to extract information from a string or to verify that a string is of the correct format. When referred to, regular expressions are often abbreviated to simply "regex". The following are examples of regular expressions: Regex Meaning . A dot matches any single character. c.t Matches "cat", "cbt" ... "c1t" ... "c&t" etc (with anything before the "c" and anything after the "t"). [0-9] Matches any single character in the range 0 to 9. [09] Matches the single character 0 or 9 (but not 1 to 8). This can be useful if you don't know the case of something, because [aA] will match either a or A. [0-9a-zA-Z] Matches any single character in the range 0 to 9 or a to z or A to Z. ? Matches any single character. * Matches the preceding element zero or more times. a[0-9]*z Will match against "az", "a1z" ... "a999z" etc. + Matches the preceding element one or more times. a[0-9]+z Will match against "a1z" ... "a999z" etc (but not "az"). {number} Matches the preceding element the specified number of times. a[0-1]{2}z Will match against "a00z", "a10z", "a01z" and "a11z". {min,max} Matches the preceding element a minimum of "min" times at at most "max" times. a[0-1]{1,2}z Will match against "a0z", "a1z", "a00z", "a10z", "a01z" and "a11z". [^...] Inverts a match - matches anything except. a[^0-1]z Will match against any three letter string starting with "a", ending with "z" that is not "a0z" or "a1z". ^ Matches at the start of the line. $ Matches at the end of the line. Escape character. Allows the following character to be treated as a literal rather than having a special meaning, thus + matches against + rather than + having its normal meaning. A Matches at the start of the string. When dealing with a single line expression A is equivalent to ^. Z Matches at the end of the string. When dealing with single line expressions Z is equivalent to $. xNN Will match against the single character with the hex code 'NN'. So

Czym jest A way of expressing a text znaczenie w Słownik informatyka A .