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Top Forums Shell Programming and Scripting Array Length Reports as Having Length when it is Empty? Post 302700489 by mrm5102 on Thursday 13th of September 2012 01:01:22 PM
Old 09-13-2012
Hey Corona688, thanks for the reply.

Yea, sorry you have to bear with me I'm no expert at this as you can see...

My problem with coding has always been OVER-Complicating things, so thanks for the suggestions! I have seen the
"grep [p]rocessname" before but hadn't a clue what it was for... Cool thanks!

Also, I need to store all the output from the "ps auxww" command because I'm also getting the start time, cpu, as well as some other stuff
that I didn't include in my code above for the sake of over-complicating my original question... Which I've seemed to do anyway, ha!

And for the moment learning the whole awk language isn't really an option at the moment due to time constraints. But I
appreciate the info and hopefully I can dive into that later...



As for arrays, I thought I remember reading that putting a command in "ARRAY=( $(...) )" would automatically split the output on the IFS and
save it into an array..? I'm guessing that's incorrect?

Just so I'm understanding arrays correctly, would I have to be explicit in giving it an index in order for it to be considered an array?
Like this: not using this but just an example...
Code:
OUTPUT=$(ps auxww | grep [p]rocessname)

IFS='
'

x=0
for line in $OUTPUT
 do
        PID[$x]=$(echo "$line" | awk -F ' ' {'print $2'})
        x=$(($x+1))
done

Anyway thanks for your suggestion, much appreciated!


Thanks Again,
Matt
 

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ARRAY(3)								 1								  ARRAY(3)

array - Create an array

SYNOPSIS
array array ([mixed $...]) DESCRIPTION
Creates an array. Read the section on the array type for more information on what an array is. PARAMETERS
o $... - Syntax "index => values", separated by commas, define index and values. index may be of type string or integer. When index is omitted, an integer index is automatically generated, starting at 0. If index is an integer, next generated index will be the big- gest integer index + 1. Note that when two identical index are defined, the last overwrite the first. Having a trailing comma after the last defined array entry, while unusual, is a valid syntax. RETURN VALUES
Returns an array of the parameters. The parameters can be given an index with the => operator. Read the section on the array type for more information on what an array is. EXAMPLES
The following example demonstrates how to create a two-dimensional array, how to specify keys for associative arrays, and how to skip-and- continue numeric indices in normal arrays. Example #1 array(3) example <?php $fruits = array ( "fruits" => array("a" => "orange", "b" => "banana", "c" => "apple"), "numbers" => array(1, 2, 3, 4, 5, 6), "holes" => array("first", 5 => "second", "third") ); ?> Example #2 Automatic index with array(3) <?php $array = array(1, 1, 1, 1, 1, 8 => 1, 4 => 1, 19, 3 => 13); print_r($array); ?> The above example will output: Array ( [0] => 1 [1] => 1 [2] => 1 [3] => 13 [4] => 1 [8] => 1 [9] => 19 ) Note that index '3' is defined twice, and keep its final value of 13. Index 4 is defined after index 8, and next generated index (value 19) is 9, since biggest index was 8. This example creates a 1-based array. Example #3 1-based index with array(3) <?php $firstquarter = array(1 => 'January', 'February', 'March'); print_r($firstquarter); ?> The above example will output: Array ( [1] => January [2] => February [3] => March ) As in Perl, you can access a value from the array inside double quotes. However, with PHP you'll need to enclose your array between curly braces. Example #4 Accessing an array inside double quotes <?php $foo = array('bar' => 'baz'); echo "Hello {$foo['bar']}!"; // Hello baz! ?> NOTES
Note array(3) is a language construct used to represent literal arrays, and not a regular function. SEE ALSO
array_pad(3), list(3), count(3), range(3), foreach, The array type. PHP Documentation Group ARRAY(3)
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