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Top Forums UNIX for Dummies Questions & Answers gawk asort to sort record groups based on one subfield Post 302711717 by lucasvs on Sunday 7th of October 2012 11:33:34 PM
Old 10-08-2012
Quote:
ou need to prepend each line in your array with primary and secondary sort fields, use asort() or asorti() to sort the modified records, and then strip off the added sort fields when you print (or otherwise process) the results.
So you mean I should
1st) sort by field1 and generate a first output
2nd) use this output to sort by subfield 2 and generate the final output.

I tried things like below but still doesn't work.
Code:
BEGIN{FS=OFS="/"}

{
# sort by field1
    array[$1] = $0

    asort(array)

# first output
    for (i in array)
        $0 = array[i]

# redefine fields in first output    
        split($0, rec, FS)
        rec[$2] = $0

        split($0, sub, " ")
        aut[++a] = sub[2]

# sort by subfield2 
        n = asort(aut)

# print final output
        for (j=1; j<=n; j++)
            print array[aut[j]]
    
}

 

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COLLATOR_SORT(3)							 1							  COLLATOR_SORT(3)

Collator::sort - Sort array using specified collator

	Object oriented style

SYNOPSIS
public bool Collator::sort (array &$arr, [int $sort_flag]) DESCRIPTION
Procedural style bool collator_sort (Collator $coll, array &$arr, [int $sort_flag]) This function sorts an array according to current locale rules. Equivalent to standard PHP sort(3) . PARAMETERS
o $coll -Collator object. o $arr - Array of strings to sort. o $sort_flag - Optional sorting type, one of the following: o Collator::SORT_REGULAR - compare items normally (don't change types) o Collator::SORT_NUMERIC - compare items numerically o Collator::SORT_STRING - compare items as strings Default sorting type is Collator::SORT_REGULAR. It is also used if an invalid $sort_flag value has been specified. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 collator_sort(3) example <?php $coll = collator_create( 'en_US' ); $arr = array( 'at', 'as', 'as' ); var_export( $arr ); collator_sort( $coll, $arr ); var_export( $arr ); ?> The above example will output: array ( 0 => 'at', 1 => 'as', 2 => 'as', )array ( 0 => 'as', 1 => 'as', 2 => 'at', ) SEE ALSO
Collator constants, collator_asort(3), collator_sort_with_sort_keys(3). PHP Documentation Group COLLATOR_SORT(3)
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