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| <<Anchor(faq67)>> == How can I trim leading/trailing white space from one of my variables? == There are a few ways to do this: {{{ #POSIX, but fails if the variable contains newlines read -r var << EOF $var EOF }}} One can also achieve in bash using a herestring {{{ # Bash still fails if the variable contains a newline. read -r x <<< "$x" }}} (note: using IFS=$' \t' read -d "" -r x partially fix the "problem" of the newlines but adds a trailing \n) There's also a solution using [[glob|extglob]]: {{{ # Bash shopt -s extglob x=${x##+([[:space:]])} x=${x%%+([[:space:]])} shopt -u extglob }}} This also works in KornShell, without needing the explicit `extglob` setting: {{{ # ksh x=${x##+([[:space:]])} x=${x%%+([[:space:]])} }}} There are many, many other ways to do this, using sed for instance: {{{ # POSIX, suppress the trailing and leading whitespace on every lines x=$(echo "$x" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//') }}} These are not necessarily the best, but they're known to work. |
My name is Valentine. Alaska is where my house is. Fencing is the only pastime her partner doesn't authorize of. After running out his job for several years he ended up being a hotel receptionist. Have a look at the most recent news on my site: https://www.youtube.com/watch?v=S6joRgSfOxA<<BR>><<BR>> <<BR>><<BR>> Here is my web blog: [[https://www.youtube.com/watch?v=S6joRgSfOxA|Rejuvenate with Dr. Marks]] |
My name is Valentine. Alaska is where my house is. Fencing is the only pastime her partner doesn't authorize of. After running out his job for several years he ended up being a hotel receptionist. Have a look at the most recent news on my site: https://www.youtube.com/watch?v=S6joRgSfOxA<<BR>><<BR>>
Here is my web blog: Rejuvenate with Dr. Marks