02-03-2011
Quote:
Originally Posted by
royalibrahim
Fantastic
malcomex999
But please clarify me few things in your code.
a) what does 'x' signify here? I am not seeing it is declared/initialized elsewhere
b) How can I use the the pattern, single quotes inside the gsub() instead of declaring a variable separately for the purpose of it?
c) One of the element in the array is having '11', but we just have the character class pattern /[0-9]/ to match this '11' instead of the multi-pattern /[0-9]*/. How this works for the multiple instances of the same pattern (i.e) digit?
d) Finally, if I want to remove the "if" statement and to make it simple with just $i ~ /[0-9], how to re-arrange the syntax?
a) You don't need to declare a variable in awk so x is null.
b) gsub(/\047/,x,$i)
c) $i ~ /[0-9]/ matches any digit found in the element. i.e, it matches 11,a11,11a,1a1,aa1. So, it matches in the element that include any digit(0-9).
d) You may need to find a way for that.
This User Gave Thanks to malcomex999 For This Post:
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LEARN ABOUT CENTOS
glob_match
GLOB_MATCH(9) libata Core Internals GLOB_MATCH(9)
NAME
glob_match - match a text string against a glob-style pattern
SYNOPSIS
int glob_match(const char * text, const char * pattern);
ARGUMENTS
text
the string to be examined
pattern
the glob-style pattern to be matched against
DESCRIPTION
Either/both of text and pattern can be empty strings.
Match text against a glob-style pattern, with wildcards and simple sets:
? matches any single character. * matches any run of characters. [xyz] matches a single character from the set: x, y, or z. [a-d] matches a
single character from the range: a, b, c, or d. [a-d0-9] matches a single character from either range.
The special characters ?, [, -, or *, can be matched using a set, eg. [*] Behaviour with malformed patterns is undefined, though generally
reasonable.
SAMPLE PATTERNS
"SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
This function uses one level of recursion per '*' in pattern. Since it calls _nothing_ else, and has _no_ explicit local variables, this
will not cause stack problems for any reasonable use here.
RETURNS
0 on match, 1 otherwise.
AUTHOR
Jeff Garzik
Author.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 GLOB_MATCH(9)