Re^2: hash array

[Anonymous Monk]

my question is : @clk_array = %clock_sheet print "@clk_array\-name\n"; i'm getting the output error as follows: 1)@clk_array having the same elements twice example: clk1 clk1 clk2 clk2 clk3 clk3 ........... it has to be clk1 clk2 clk3 ......... 2)the extension _name is coming for the last element only i want the extension for all the elements eg:clk1_name clk2_name clk3_name

[bart]

I think McA pretty much got it nailed. Let me tell you what is going on.
1. @clk_array = %clock_sheet; will flatten the hash as a list in the form (key1, value1, key2, value2, ...). You either want just the keys, or just the values. For which, duh, keys and values could be very useful. Like:

   @clk_array = keys %clock_sheet;
   

   or

   @clk_array = values %clock_sheet;
   

2. You magically expect "@clk_array\-name" to distribute the suffix "-name" across each element. But instead the string will take each value from the array, and join them with the current value of $" which is a space by default, and then append the suffix to the whole.

   To distribute the suffix over every element, you can use map:

   @clk_with_suffix = map "$_-name", @clk_array;
   

[McA]

A ++ for the explanation.

[Anonymous Monk]

thanks my issue got solved .... can u please explain about "map"

[bart]

map is a looping function to apply an expression or a block to every item in a list (each item in turn assigned to $_), and collect/return the list of results. It's like:

my @results;
foreach(@_) {
    push @results, &$CODE();
}
return @results;

where $CODE is the expression (delimited by a comma) or block (no delimiter) in the first argument.

example:

@output = map $_*2, 1 .. 10;

which is identical in result to

@output = map { $_*2 } 1 .. 10;

and which return the even numbers from 2 to 20; the double of all numbers between 1 and 10.

[McA]

Please have a look at perldoc -f map. If there's something you don't understand, allmost everyone will help you.

[McA]

Hmm, we can't see what's in your %clock_sheet. What is 'clk1'. Is it a key or a value or both in %clock_sheet?

Please show us the content of the %clock_sheet. You can achieve that by:

use Data::Dumper;
print Dumper(\%clock_sheet), "\n";

[Anonymous Monk]

$VAR1 = { 'CLK_DBU' => 'CLK_DBU', 'CLK_IC_LMI0' => 'CLK_IC_LMI0', 'CLK_IC_ODP' => 'CLK_IC_ODP', 'CLK_T2' => 'CLK_T2', 'CLK_T3' => 'CLK_T3', 'CLK_DIRT' => 'CLK_DIRT', 'CLK_T1' => 'CLK_T1', 'CLK_CPU_SYS' => 'CLK_CPU_SYS' };