Matching only the strings I provide

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Top Forums Shell Programming and Scripting Matching only the strings I provide - sed Post 302964401 by RudiC on Thursday 14th of January 2016 06:44:05 AM

01-14-2016

Registered User

I don't think sed can solve this efficiently. How about awk? Try

Code:

awk '
BEGIN   {for (n=split("stockholm paris tokyo", T); n>0; n--) C[T[n]] = n
        }
        {for (i=1; i<=NF; i++)  {V = ""
                                 for (c in C) if ($i ~ c) V = c
                                 sub (/[^<>]+/, V, $i)
                                 printf "%s%s", $i, (i<NF)?FS:""
                                }
         printf "\n"
        }
' FS="-" file
<-paris<-stockholm->tokyo->paris<-stockholm->paris
<-tokyo<-stockholm<-tokyo->paris->tokyo<-paris
<-tokyo<-paris<-stockholm->tokyo<-stockholm->tokyo
<-tokyo->tokyo<-paris<-paris<-tokyo->tokyo
<-stockholm<-tokyo<-tokyo<-stockholm<-stockholm<-tokyo
<-tokyo->paris->paris->stockholm<-paris->stockholm
.
.
.

---------- Post updated at 12:44 ---------- Previous update was at 12:42 ----------

Or even

Code:

awk '
BEGIN   {for (n=split("stockholm paris tokyo", T); n>0; n--) C[T[n]] = n
        }
        {for (i=1; i<=NF; i++)  {V = ""
                                 for (c in C) if ($i ~ c) V = c
                                 sub (/[^<>]+/, V, $i)
                                }
        }
1
' FS="-" OFS="-" file

RudiC

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LEARN ABOUT REDHAT

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)

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