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Top Forums Shell Programming and Scripting extracting a set of strings from a text file Post 302136853 by Deanne on Thursday 20th of September 2007 03:52:12 AM
Old 09-20-2007
Question extracting a set of strings from a text file

i have textfiles that contain a series of lines that look like this:

string0 .................................................... column3a column4a
string1**384y0439 ..................................... column3b column4b
string2**23903990 ..................................... column3c column4c
string3 .................................................. column3d column4d
string4**67823678 ..................................... column3e column4e

can you help me write a C-shell script that will list all the unique strings before the ** ?
if a string is not followed by ** (eg. string0 and string3), the string should be in the list, whether or not it is unique.
I think I need to first filter out the lines without .................................. (which are always at the beginning and end part of the textfile).

can anyone help me with this please?
thanks a lot!
 

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fstrcmp(3)						     Library Functions Manual							fstrcmp(3)

NAME
fstrcmp - fuzzy comparison of two strings SYNOPSIS
#include <fstrcmp.h> #define FSTRCMP_IDENTICAL #define FSTRCMP_THRESHOLD #define FSTRCMP_ERROR double fstrcmp(const char *string1, const char *string2); DESCRIPTION
The fstrcmp() function compares the two strings, string1 and string2. RETURN VALUE
The fstrcmp function returns a floating point value between 0.0 and FSTRCMP_IDENTICAL. A value of 0.0 means the strings are utterly un- alike. A value of FSTRCMP_IDENTICAL means the strings are identical. A value of more than FSTRCMP_THRESHOLD (it lies between 0.0 and FSTRCMP_IDENTICAL) would be considered "similar" by most people. A value of FSTRCMP_ERROR (always negative) indicates a malloc(3) failure. SEE ALSO
fmemcmp(3) fuzzy comparison of two memory areas fstrcasecmp(3) fuzzy comparison of two strings ignoring case fstrcmpi(3) fuzzy comparison of two strings strcmp(3) compare two strings COPYRIGHT
fstrcmp version 0.4 Copyright (C) 2009 Peter Miller Peter Miller <pmiller@opensource.org.au> The comparison code is derived from the fuzzy comparison functions in GNU Gettext 0.17. The GNU Gettext comparison functions were, in turn, derived from GNU Diff 2.7. Copyright (C) 1988-2009 Free Software Foundation fstrcmp(3)
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