Extract substring using regexp in plain bash

Question

I m trying to extract the time from a string using bash  and I m having a hard time figuring it out   My string is like this   US Central - 10 26 PM  CST    And I want to extract the 10 26 part   Anybody knows of a way of doing this only with bash - without using sed  awk  etc   Like  in PHP I would use - not the best way  but it works - something like   preg match      d 2    d 2   PM   CST       US Central - 10 26 PM  CST     matches      Thanks for any help  even if the answer uses sed or awk

User · Answer

Quick  n dirty  regex-free  low-robustness chop-chop technique  string  US Central - 10 26 PM  CST   etime    string   AP M    etime    etime   -

User · Answer

If your string is  foo  US Central - 10 26 PM  CST     then  echo    foo     cut -d     -f3   will do the job

User · Answer

Using pure bash      cat file txt US Central - 10 26 PM  CST    while read a b time x  do     b    -     amp  amp  echo  time  done  lt  file txt   another solution with bash regex          US Central - 10 26 PM  CST      -   space      0-9  2   0-9  2       amp  amp      echo   BASH REMATCH 1     another solution using grep and look-around advanced regex      echo  US Central - 10 26 PM  CST     grep -oP   - s  K d 2   d 2     another solution using sed      echo  US Central - 10 26 PM  CST         sed  s    -     0-9   2    0-9   2        1     another solution using perl      echo  US Central - 10 26 PM  CST         perl -lne  print   amp  if   - s  K d 2   d 2      and last one using awk      echo  US Central - 10 26 PM  CST         awk   for  i 0  i lt  NF  i    if   i     -   print   i 1  exit

User · Answer

echo  US Central - 10 26 PM  CST     sed -n  s    - s    S        1 p   -n      suppress printing s       substitute         anything at the beginning -       up until the dash  s      any space characters  any whitespace character          start capture group  S      any non-space characters         end capture group         anything at the end  1      substitute 1st capture group for everything on line p       print it

[regex] Extract substring using regexp in plain bash

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