06-22-2016
The items to delete are in the input file. This script is just to prove the loop works. input is the file I want to delete from. I could use sed edit in place or not. Some internet posts said the sed -i option was not working in a loop. I did not verify.
I have an 18MB data file with a lot of redundant repeated lines that need to be deleted. Having an outside file containing a list of those lines to be deleted is best for this script. I want to read into the loop the source file and output to a second file. The source file has about 15 MB of repeated useless data to remove so looping over the file seems the best choice. I dont really care what construct I use but I am not having luck with those I have tested.
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LEARN ABOUT PHP
collator_asort
COLLATOR_ASORT(3) 1 COLLATOR_ASORT(3)
Collator::asort - Sort array maintaining index association
Object oriented style
SYNOPSIS
public bool Collator::asort (array &$arr, [int $sort_flag])
DESCRIPTION
Procedural style
bool collator_asort (Collator $coll, array &$arr, [int $sort_flag])
This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is
used mainly when sorting associative arrays where the actual element order is significant. Array elements will have sort order according to
current locale rules.
Equivalent to standard PHP asort(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 $sort_flag value 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_asort(3)example
<?php
$coll = collator_create( 'en_US' );
$arr = array(
'a' => '100',
'b' => '50',
'c' => '7'
);
collator_asort( $coll, $arr, Collator::SORT_NUMERIC );
var_export( $arr );
collator_asort( $coll, $arr, Collator::SORT_STRING );
var_export( $arr );
?>
The above example will output:
array (
'c' => '7',
'b' => '50',
'a' => '100',
)array (
'a' => '100',
'b' => '50',
'c' => '7',
)
SEE ALSO
Collator constants, collator_sort(3), collator_sort_with_sort_keys(3).
PHP Documentation Group COLLATOR_ASORT(3)