But if I type like that text (space after word) my app doesn't recognise markdown. That's exactly why this is for you to judge case by case. I convert html output to markdown.I have a problem like that If I type text it works. If youre looking for common spacing, use X. a-zA-Z.,- matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy) a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive) A-Z matches a single character in the range between A. You want to change the indentation in a plain text notes file, would be better suited.Īlthough, this may not be a hard and fast rule, as many source files can contain tabs as whitespace. If youre looking for one or more, its (thats two spaces and an asterisk) or (one space and a plus). Match a single character present in the list below.Say you are looking for a name (variable, function, etc) in C source, \s would be sufficient.If your use case considers characters like tab as whitespace, you should use the latter, if not, \s should be fine. If you compare the docs for \s with that for ]* (linked above), the latter is a superset. I tested interactive use with highlight-regexp and isearch-forward-regexp, and elisp use with M-: (search-forward-regexp "=\n]*"). You can enter ^J by just quoting your newline: C-q C-j. When entered interactively, this seems to work: =^J]*. You can see that there are many whitespace characters among the matched characters s: Matches one whitespace character, such as space or. The most common forms of whitespace you will use with regular expressions are the space ( ), the tab ( \t ), the new line ( ) and the carriage return ( \r) (useful in Windows environments), and these special characters match each of their respective whitespaces. I would say use when the usage context is textual, and use when it is programmatic, i.e. See the Match whitespace but not newlines (Perl) question for more detail. word characters are a-zA-Z0-9 s, S: ANY ONE space/non-space character. You could always use one of the character classes. If you're using Perl or PCRE, you have the option of using the \h shorthand for horizontal whitespace, which appears to include the single-byte space, double-byte space, and tab, among others. Regular Expression, or regex or regexp in short, is extremely and amazingly.
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