Sorting a perl array of arrays

Question

I have a table in an array and I am trying to sort it using the following method:

@table_array = sort { $a->[0] <=> $b->[0] } @table_array;

But I get this error:

Can't use string ("5") as an ARRAY ref while "strict refs" in use at

My $table_array[x][0] is a numeric value. I create this table by reading two files and merging them on a common field ($table_array[x][1] to be exact).

I am not able to understand where I have asked the elements to be accessed using string references.

Thanks, Karthick S.

See sort

Chris Charley
– Chris Charley

2013-03-02 17:37:16 +00:00
Commented Mar 2, 2013 at 17:37 — Chris Charley
– Chris Charley, Commented Mar 2, 2013 at 17:37

ikegami · Accepted Answer · 2013-03-02 17:48:10Z

3

My $table_array[x][0] is a numeric value.

No, that's not true. For one of the elements, $table_array[x] is 5 instead of a reference.

>perl -e"use strict; $a=5; $a->[0]"
Can't use string ("5") as an ARRAY ref while "strict refs" in use at -e line 1.

Maybe you did

$table_array[$x] = @rec;

instead of

$table_array[$x] = \@rec;

edited Mar 2, 2013 at 17:48

answered Mar 2, 2013 at 17:38

ikegami

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