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Full Discussion: Array and Selection
Top Forums Shell Programming and Scripting Array and Selection Post 302126720 by Perderabo on Thursday 12th of July 2007 02:23:25 PM
Old 07-12-2007
I'm not sure I follow you. But here is an attempt at what I think you may want:
Code:
#! /usr/bin/ksh

nline=0
while read line ; do
        ((element=nline%1000))
        ((narray=nline/1000))
        eval array${narray}[$element]=\$line
        ((nline=nline+1))
done < bigfile
((count=narray*1000+element))




while echo enter x,y \\c  ; read  x y ; do
        echo x = $x
        echo y = $y

        ((lineno=(y-1)*1024+x))
        echo lineno = $lineno
        ((element=(lineno-1)%1000))
        ((narray=(lineno-1)/1000))
        echo element = $element
        echo narray = $narray
        eval value=\"\${array${narray}[$element]}\"
        echo value = $value
done
echo
exit 0

The first paragraph just reads a file into a very large array. Ideally, I would use a 6000 element array. But ksh does not guarantee that arrays that large will work. So I use a collection of arrays, each with 1000 elements. To access element 1234, I use real element 234 of array 1. Then I have a loop that reads coordinates and calculates the line number coresponding to those coordinates. Then I convert the line number to array/element and grab the value. To test it, I created a bigfile with:
yes | awk '{print NR,$0}' | sed 6000q > bigfile
 

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DOMDOCUMENT.CREATEELEMENT(3)						 1					      DOMDOCUMENT.CREATEELEMENT(3)

DOMDocument::createElement - Create new element node

SYNOPSIS
public DOMElement DOMDocument::createElement (string $name, [string $value]) DESCRIPTION
This function creates a new instance of class DOMElement. This node will not show up in the document unless it is inserted with (e.g.) DOMNode.appendChild(3). PARAMETERS
o $name - The tag name of the element. o $value - The value of the element. By default, an empty element will be created. The value can also be set later with DOMElement::$node- Value. RETURN VALUES
Returns a new instance of class DOMElement or FALSE if an error occurred. ERRORS
/EXCEPTIONS o DOM_INVALID_CHARACTER_ERR - Raised if $name contains an invalid character. EXAMPLES
Example #1 Creating a new element and inserting it as root <?php $dom = new DOMDocument('1.0', 'utf-8'); $element = $dom->createElement('test', 'This is the root element!'); // We insert the new element as root (child of the document) $dom->appendChild($element); echo $dom->saveXML(); ?> The above example will output: <?xml version="1.0" encoding="utf-8"?> <test>This is the root element!</test> NOTES
Note The $value will not be escaped. Use DOMDocument::createTextNode to create a text node with escaping support. SEE ALSO
DOMNode::appendChild, DOMDocument::createAttribute, DOMDocument::createAttributeNS, DOMDocument::createCDATASection, DOMDocument::create- Comment, DOMDocument::createDocumentFragment, DOMDocument::createElementNS, DOMDocument::createEntityReference, DOMDocument::createPro- cessingInstruction, DOMDocument::createTextNode. PHP Documentation Group DOMDOCUMENT.CREATEELEMENT(3)
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