05-19-2016
Quote:
Originally Posted by
cmccabe
So the id is read into the A array and a loop captures the matching lengths. I am not sure what X or i is? Sorry scientist trying to learn. Thank you
.
The
A is an associative array, meaning that index is not an ordered sequence of numbers, but an string. In order to get back the value you need to know the "index".
for(i in A) is the way that AWK iterate over the
A array, setting
i to an "index" at each iteration. The disadvantage is that the
order may no be as it was taken from the file nor it is guarantee to be the same
order each time you run the program.
This User Gave Thanks to Aia For This Post:
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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)