Sed non whitespace Jun 10, 2021 · sed possible white space match. Matches only at the start of pattern space. I would like to use Bash (preferably via sed) to replace any non-whitespace characters in the file with the letter M. These can be used in both basic and extended regular expressions (that is, with or without the -E/-r options). Here, denotes whitespace characters, and denotes non-white space characters. (in sed scripts the commands are normally terminated by newlines) With GNU sed you can use \n in the substitution, and \s in the regex: sed -e 's/\s\s*/\n/g' Aug 12, 2010 · However, ZERO WIDTH SPACE, WORD JOINER, and ZERO WIDTH NON-BREAKING SPACE (if it used as other than a byte-order mark) fit the whitespace rule in my book. Improve this question. 1. Here is an example: Jul 25, 2009 · \s matches any white-space character \S matches any non-white-space character; You can match a space character with just the space character; [^ ] matches anything but a space character. Apr 21, 2015 · But the problem with this is there is 6 empty white spaces before it which throws off the rest of my script. Mar 6, 2021 · Note that some tr implementations including GNU tr only work correctly with single-byte characters, so they would fail to handle blank characters such as U+1680 OGHAM SPACE MARK, U+2000 EN QUAD, U+2001 EM QUAD, U+2002 EN SPACE, U+2003 EM SPACE, U+2004 THREE-PER-EM SPACE, U+2005 FOUR-PER-EM SPACE, U+2006 SIX-PER-EM SPACE, U+2008 PUNCTUATION SPACE, U+2009 THIN SPACE, U+200A HAIR SPACE, U+205F . Why does this sed command not match whitespace? 1. sed DON'T remove extra whitespace. 0. How to detect empty string which may include white spaces in bash? 0. Ask Question Asked 7 years, 6 months ago. With GNU sed: May 30, 2024 · For those who look for efficiency (many files to process, or huge files), using the + repetition operator instead of * makes the command more than twice faster. Hot Network Questions Jan 3, 2013 · sed regex match non-whitespace or tab. But in case the underlying question is about replacing spaces by _ really, here is an alternative answer using the "right tool for the job" for translating characters, which is tr. Apr 30, 2017 · Many sed implementations don't know about \n, so you need a literal newline. 2. How would I go about doing this? Thanks for helping. Apr 23, 2024 · Sed provides handy shortcuts to match and manipulate whitespace in text. 3. Ask Question Asked 3 years, 7 months ago. Viewed 8k times Jul 1, 2015 · White spaces capturing with sed. The replacement text should not contain \s unless you want a slash-s in the output. abcX %-= defX. The following sequences have special meaning inside regular expressions (used in addresses and the s command). Modified 3 years, Could Ross Ulbricht be charged by non-US court after pardon? May 31, 2012 · Sed failed to match non whitespace characters with character class. BRE how to match up to empty spaces at the end of line? 2. Viewed 4k times 1 I am processing an XML file with sed. Use sed with regular expression for space. The backslash before the newline prevents sed from getting upset about the newline. Apr 4, 2020 · Which replaces any sequence of one or more whitespace characters following a non-whitespace, with that non-whitespace and one single SPC character, and remove the trailing whitespace characters, which would cover blank lines and lines with trailing whitespace (including the CRs found at the end of lines coming from Microsoft text files). Here's another example: [abc] means "match a, b or c "; [^abc] means "match any character except a, b or c ". I attempted the answer found here Skip/remove non-ascii character with sed but nothing was removed. This is different from ^ in multi-line mode. Matches the beginning of a word. Note. You are not required to write code. 20. The whitespace could be 2 or 3 tabs or spaces, depending on how the developer formatted the file. Delete whitespace between two specific words in sed. Nov 1, 2015 · sed's substitute command looks like s/old/new/ where old should be a regular expression, which may contain \s to mean whitespace, and new should be the replacement text. Sed supports BRE(Basic regular expressions), aka POSIX BRE, and if using GNU sed, there is the option -r that makes it support ERE(extended regular expressions) aka POSIX ERE, but still not PCRE) Mar 31, 2010 · what would be the best way to remove whitespace only around certain character. Matches non-whitespace characters. Ask Question Asked 7 years, 10 months ago. 6 regular expression extensions. Xabc %-= Xdef. Aug 16, 2022 · I need it to detect if there is a non-whitespace character before and affter the straight quote. (man tr). I tried this: The question asks explicitly about sed, and it's a very valid question about sed regexp syntax. Modified 7 years, 6 months ago. How to regexp match surrounding whitespace or beginning/end of Mar 16, 2017 · I can't seem to get a working SED replace for whitespace in b/t characters. With GNU sed: # match any non-whitespace char--works in bash and `grep` too [^\r\n\t\f\v ] Details. Force sed to ignore white space. Feb 24, 2010 · In my data I want to match all of 3+ subsequent whitespace characters (tab space) and replace them by 2 spaces. unix; sed; Adding zeros to the right or left of a comma / non-comma containing decimal May 30, 2024 · For those who look for efficiency (many files to process, or huge files), using the + repetition operator instead of * makes the command more than twice faster. This is a regex only challenge. And if there is, replace the straight quote with the curly quote. Matches the end of a word. For example: will substitute every sequence of at least 3 whitespaces with two spaces. The answer, is that as of writing, you can't - sed does not support it. Non-capturing groups have the syntax of (?:a) and are a PCRE syntax. 5. 4. I have included the line which produces it below: cat temp | uniq -c | sed 's/ */ /g' > temp2 I have narrowed it down to being the uniq command that produces the unnecessary white space. Therefore, I include them in my horizontal whitespace character class. Modified 7 years, 10 months ago. You can use either the character group [ \t] (which matches the space or tab characters) or the equivalent POSIX bracket expression [:blank:] . For example, to print lines starting with whitespace: And to print lines without initial whitespace: To delete leading whitespace, use the following substitution command: Feb 15, 2017 · Sed failed to match non whitespace characters with character class. Matching \S (any non-whitespace character) apparently doesn't work in regular expressions in bash or grep or similar. edit: For the downvoters, I tried running this: sed -i 's/[^\s]/M/g' file and this: The color information output by grep takes the form of special character sequences (see answers to this StackOverflow question), so if the colon is colored and the whitespace isn't, or vice versa, then that means that one of these character sequences will be between them, so sed will not see them as adjacent characters. The shortcut \s matches a whitespace character, while \S matches non-whitespace. . regex; bash; sed; replace; Share. How can I match any non-whitespace character except a backslash \? You can use a character class: matches anything that is not a whitespace character nor a \. So, instead of using this to match one or more occurrences of any non-whitespace character: Dec 24, 2019 · The problem I'm running into is that it is stripping the preceding whitespace and I want to keep the preceding whitespace. Pick whichever is most appropriate. How to match whitespace in sed? 2. sed find and replace fails when string has a space in it. Jul 5, 2020 · Sed - Adding white spaces to the end of line. May 25, 2011 · In Perl \S matches any non-whitespace character. Just allow the regular expression to match whitespace as well. Feb 20, 2016 · I have a text file that contains a lot of whitespace and some other ASCII characters. Dec 16, 2008 · To generalize the solution to handle all forms of whitespace, replace the space character in the tr and sed commands with [[:space:]]. Let's say a dash - Some- String- 12345- Here would become Some-String-12345-Here. How can this be done? The character class \s will match the whitespace characters <tab> and <space>. Newlines embedded in the pattern/hold spaces will also match: abcX%-=Xdef. Regex Space character in Sed. Matches whitespace characters (spaces and tabs). Replace White Spaces Apr 5, 2018 · Test if string has non whitespace characters in Bash. Note that the sed approach will only work on single-line input. vwlhgxdc eqgbvkuu jioqyz faognjj fhwrqee hzlic jfx mrfpps cvo dny