Split bash string by newline characters

Question

I found this   And I am trying this   x  some    thing   y    x   n      And I had no luck  I thought it could work with double backslash   y    x    n      But it did not   To test I am not getting what I want I am doing   echo   y 1     Getting   some thing   Which I want to be   some   I want y to be an array  some  thing   How can I do this

User · Answer

There is another way if all you want is the text up to the first line feed:

x='some
thing'

y=${x%$'\n'*}

After that y will contain some and nothing else (no line feed).

What is happening here?

We perform a parameter expansion substring removal (${PARAMETER%PATTERN}) for the shortest match up to the first ANSI C line feed ($'\n') and drop everything that follows (*).

User · Answer

Another way   x   Some nstring  readarray -t y  lt  lt  lt   x    Or  if you don t have bash 4  the bash 3 2 equivalent   IFS    n  read -rd    -a y  lt  lt  lt   x    You can also do it the way you were initially trying to use   y    x     n        This  however  will not function correctly if your string already contains spaces  such as  line 1 nline 2   To make it work  you need to restrict the word separator before parsing it   IFS    n  y    x     n           and then  since you are changing the separator  you don t need to convert the  n to space anymore  so you can simplify it to   IFS    n  y   x    This approach will function unless  x contains a matching globbing pattern  such as      - in which case it will be replaced by the matched file name s   The read readarray methods require newer bash versions  but work in all cases

[string] Split bash string by newline characters

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