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Full Discussion: compare versions.
Top Forums Shell Programming and Scripting compare versions. Post 302537976 by pludi on Monday 11th of July 2011 09:49:51 AM
Old 07-11-2011
Since they're not pure numbers, Perl is treating them like strings, and then the comparison follows the rules of the strcmp function. The first and second character in both are the same, but the third is different, and 1 comes before 9, and is thus considered lower.
 

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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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