01-19-2018
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Will negative values be present in field (COL) 2?
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Hi all,
I have a file that contains a list of codes (shown below).
I want to 'uniq' the file using only the first field. Anyone know an easy way of doing it?
Cheers,
Dave
##### Input File #####
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Hi ;
I have a question regarding the uniq command in unix
How do I uniq 3rd field in a file ?
original file :
zoom coord 39 18652 39 18652
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How can I use uniq on a certain field or what else could I use? If I want to use uniq on the second field and the output would remove one of the lines with a 5.
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I am searching for a script which will produce an output file with the uniq first field with the second field having highest value among all the duplicates..
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I want to bring values in the second column into single line for uniq value in the first column.
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LEARN ABOUT PHP
array_intersect_ukey
ARRAY_INTERSECT_UKEY(3) 1 ARRAY_INTERSECT_UKEY(3)
array_intersect_ukey - Computes the intersection of arrays using a callback function on the keys for comparison
SYNOPSIS
array array_intersect_ukey (array $array1, array $array2, [array $...], callable $key_compare_func)
DESCRIPTION
array_intersect_ukey(3) returns an array containing all the values of $array1 which have matching keys that are present in all the argu-
ments.
PARAMETERS
o $array1
- Initial array for comparison of the arrays.
o $array2
- First array to compare keys against.
o $...
- Variable list of array arguments to compare keys against.
o $key_compare_func
- The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to
be respectively less than, equal to, or greater than the second.
int callback (mixed $a, mixed $b)
RETURN VALUES
Returns the values of $array1 whose keys exist in all the arguments.
EXAMPLES
Example #1
array_intersect_ukey(3) example
<?php
function key_compare_func($key1, $key2)
{
if ($key1 == $key2)
return 0;
else if ($key1 > $key2)
return 1;
else
return -1;
}
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
var_dump(array_intersect_ukey($array1, $array2, 'key_compare_func'));
?>
The above example will output:
array(2) {
["blue"]=>
int(1)
["green"]=>
int(3)
}
In our example you see that only the keys 'blue' and 'green' are present in both arrays and thus returned. Also notice that the values for
the keys 'blue' and 'green' differ between the two arrays. A match still occurs because only the keys are checked. The values returned are
those of $array1.
SEE ALSO
array_diff(3), array_udiff(3), array_diff_assoc(3), array_diff_uassoc(3), array_udiff_assoc(3), array_udiff_uassoc(3), array_diff_key(3),
array_diff_ukey(3), array_intersect(3), array_intersect_assoc(3), array_intersect_uassoc(3), array_intersect_key(3).
PHP Documentation Group ARRAY_INTERSECT_UKEY(3)