That's what I thought. If in the first example you invoke cp once with 881 filenames, then you compare apples with apples. find needs the {} to appear just in front of the +, so it does not work out for every command. Fortunately cp has the -t option. So it'd be interesting to invoke it like
hi all,
i am looking for ways to make ftp efficient by tuning the parameters
currently,
tcp_max_buf is 1 MB
tcp_xmit_hiwat is 48 KB
say to transmit multiple 2 gb files from unix server to mainframe sys,
will increasing the window size or the send buffer size of the current TCP/IP... (6 Replies)
Language: ksh
OS: SunOS
I have been getting the 'subscript out of range' error when the below array variable gets elements greater that 1024. I understand that 1024 is the default size for 'set -A' dynamic array, but is there a way to initialize it with a larger number?
set -A arr `grep... (6 Replies)
Hi,
Does anyone know if it is possible to tar files larger than 2GB? The reason being is they want me to dump a single file (which is around 20GB) to a tape drive and they will restore it on a Solaris box. I know the tar have a limitation of 2GB so I am thinking of a way how to overcome this.... (11 Replies)
Hi,
I am new to unix , I was planning to write a script that will FTP files to destination folder. , Please guide me what are the various networking commands that unix will help in this ftp process..?:confused: (1 Reply)
Hello!
This is my first post, and I just learned what UNIX was this week. For a JAVA programming class I am taking, I must be able to create a directory in UNIX, use the nano command to create a JAVA program, compile it, and then run it on the command prompt using the java command.
For some... (5 Replies)
My unzip command doesn't work for files that are greater than 4GB. Consider my file name is unzip -p -a filename.zip, the command doesn't work since the size of the file is larger. I need to know the corresponding 7z command for the same. This is my Unix shell script program:
if
then
... (14 Replies)
I need to backup my database but the files are very large and the TAR command will not let me. I searched aids and found that I could do something with the mknod, COMPRESS and TAR command using them together. I appreciate your help. (10 Replies)
Hi,
I have one large files of 100000 rows with header column.
Eg:
Emp Code, Emp Name
101,xxx
102,YYY
103,zzz
...
...
I want to split the files into smaller files with only 30000 rows each..File 1,2 and 3 must have 30000 rows and file 4 must contain 10000 rows.
But the column... (1 Reply)
I need help modifying these two scripts to do the following:
- print files in (MB) instead of (KB)
- only select files larger than 500MB -> these will be mailed out daily
- Select all files regardless of size all in (MB) -> these will be mailed out once a week
this is what i have so far and... (5 Replies)
I am new at developing EXPECT scripts. I'm trying to create a script that will automatically connect to a several UNIX (sun solaris and HPUX) database server via FTP and pull the sizes of the listener/alert log files from specified server directory on the remote machines.
1. I want the script... (7 Replies)
Discussion started by: mikebantor
7 Replies
LEARN ABOUT PHP
usort
USORT(3) 1 USORT(3)usort - Sort an array by values using a user-defined comparison functionSYNOPSIS
bool usort (array &$array, callable $value_compare_func)
DESCRIPTION
This function will sort an array by its values using a user-supplied comparison function. If the array you wish to sort needs to be sorted
by some non-trivial criteria, you should use this function.
Note
If two members compare as equal, their relative order in the sorted array is undefined.
Note
This function assigns new keys to the elements in $array. It will remove any existing keys that may have been assigned, rather than
just reordering the keys.
PARAMETERS
o $array
- The input array.
o $value_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 $b)
Caution
Returning non-integer values from the comparison function, such as float, will result in an internal cast to integer of the
callback's return value. So values such as 0.99 and 0.1 will both be cast to an integer value of 0, which will compare such
values as equal.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
usort(3) example
<?php
function cmp($a, $b)
{
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
$a = array(3, 2, 5, 6, 1);
usort($a, "cmp");
foreach ($a as $key => $value) {
echo "$key: $value
";
}
?>
The above example will output:
0: 1
1: 2
2: 3
3: 5
4: 6
Note
Obviously in this trivial case the sort(3) function would be more appropriate.
Example #2
usort(3) example using multi-dimensional array
<?php
function cmp($a, $b)
{
return strcmp($a["fruit"], $b["fruit"]);
}
$fruits[0]["fruit"] = "lemons";
$fruits[1]["fruit"] = "apples";
$fruits[2]["fruit"] = "grapes";
usort($fruits, "cmp");
while (list($key, $value) = each($fruits)) {
echo "$fruits[$key]: " . $value["fruit"] . "
";
}
?>
When sorting a multi-dimensional array, $a and $b contain references to the first index of the array.
The above example will output:
$fruits[0]: apples
$fruits[1]: grapes
$fruits[2]: lemons
Example #3
usort(3) example using a member function of an object
<?php
class TestObj {
var $name;
function TestObj($name)
{
$this->name = $name;
}
/* This is the static comparing function: */
static function cmp_obj($a, $b)
{
$al = strtolower($a->name);
$bl = strtolower($b->name);
if ($al == $bl) {
return 0;
}
return ($al > $bl) ? +1 : -1;
}
}
$a[] = new TestObj("c");
$a[] = new TestObj("b");
$a[] = new TestObj("d");
usort($a, array("TestObj", "cmp_obj"));
foreach ($a as $item) {
echo $item->name . "
";
}
?>
The above example will output:
b
c
d
Example #4
usort(3) example using a closure to sort a multi-dimensional array
<?php
$array[0] = array('key_a' => 'z', 'key_b' => 'c');
$array[1] = array('key_a' => 'x', 'key_b' => 'b');
$array[2] = array('key_a' => 'y', 'key_b' => 'a');
function build_sorter($key) {
return function ($a, $b) use ($key) {
return strnatcmp($a[$key], $b[$key]);
};
}
usort($array, build_sorter('key_b'));
foreach ($array as $item) {
echo $item['key_a'] . ', ' . $item['key_b'] . "
";
}
?>
The above example will output:
y, a
x, b
z, c
SEE ALSO uasort(3), The comparison of array sorting functions.
PHP Documentation Group USORT(3)