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The regex ".+" (including the double-quotes) applied to the string "Ganymede," he continued, "is the largest moon in the Solar System." matches the entire line (because the entire line begins and ends with a double-quote) instead of matching only the first part, "Ganymede," .
A metacharacter is a character that has a special meaning to a computer program, such as a shell interpreter or a regular expression (regex) engine.. In POSIX extended regular expressions, there are 14 metacharacters that must be escaped — preceded by a backslash (\) — in order to drop their special meaning and be treated literally inside an expression: opening and closing square brackets ...
Rather than use the search box, where entering an equals sign and a pipe character, and "quotes around phrases" is a straightforward matter, it is still easiest to use a regex-based search-link template — {} or {} — on the page with sample data, because then you can focus on the target data there and on writing the regexp pattern. It is ...
Metacharacters are interpreted unless quoted by a backslash, double quotes, or square brackets. See the section on regex. The obvious example is, you must quote any slash in your pattern so it won't be interpreted as the closing slash delimiter, using \/ instead of / to match a literal slash. A regexp interprets all metacharacters.
/ is special because it indicates the end of the regex. For example, insource:/yes/no/ is treated the same as insource:/yes/ no (because the keyword search for no/ ignores punctuation). The / character must be backslash-escaped everywhere it appears inside a regex – even inside square brackets or quotation marks.. matches any single character.
The backslash (\) escape character typically provides two ways to include double-quotes inside a string literal, either by modifying the meaning of the double-quote character embedded in the string (\" becomes "), or by modifying the meaning of a sequence of characters including the hexadecimal value of a double-quote character (\x22 becomes ").
The template trims matched pairs of leading and trailing single and double quotes from a string. Template parameters Parameter Description Type Status String 1 The string to be trimmed String required See also {{ trim }}
Regex – If checked indicates that the find and replace expression is a regular expression. Multiline – If checked, this indicates to AWB that the regex characters "^" and "$" ought to match at the beginning and the end of lines respectively, not just the beginning and end of the entire page.