Thanks for the quick replies. I was able to get the read to work.
But for some reason I was not getting inside the if condition loop. I kept getting this error:
Turns out the if statement cannot handle -o or ||. Strange, but that's a problem for some other day.
My code looks like this now, I thought about awk '/myAgent/{print8}', but I then get an extra line with just awk. So I'll have to do a grep -v awk.
I am just stucked in syntax.This is more like a array and for loop problem.
I want to use ls -l command and get filezise and filename of all filenames in the directory in an array (say array#1).
After 2 minutes of sleep, i want to get the same information in another array (say array#2).
The... (4 Replies)
- I m retreving values from database and wish to use those values later in my shell script. I m placing these values in an array da_data but outside loop array is empty.Problem is its treating array as local inside loop hence array is empty outside loop.
Plz go through the script and suggest how... (1 Reply)
Hello!
I have a question about loops and arrays. I'm trying to go through this:
for aa in 01 02 03
OrigNum=$(grep ${Orig} Ba3In2F12.prepos | wc -l)
OrigNum=$((${OrigNum} - 1))
echo ${OrigNum}
etc
It gets stuck on the second line. The error reads:
./asdf: line 30:... (5 Replies)
Hi
I have something like
cat $HOME/all_dirs | while read ln_old_dirs
do
if
then
echo "$ln_all_old_dirs"
fi
done
As you know that the variable ln_all_old_dirs is not accessable from outside the... (2 Replies)
Hi everyone:)
I have 2 files - IN & OUT. Example:
IN
A:13:30
B:45:40
.
.
. UNLIMITED
OUT
Z:12:24
Y:20:15
.
.
. UNLIMITED
I want first row of numbers of IN - OUT. Example 13-12 45-20
My code is (2 Replies)
I've got this problem, if I modify an array in the loop and print it, everything is fine as long as I stay in the loop. But, when I print it outside the loop, nothing happens... How can I solve this problem?
Here I prepared a sample for you to see my problem;
zgrw@Rain:~$ cat test
asd
123... (4 Replies)
Hello All,
Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....?
I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping
through a string containing some of these "Illegal Characters". Now... (5 Replies)
Hi, I have the following problem that is beyond what I can currently do with bash scripting.
In file 1, I have ~ 2500000 values. Note this file is not sorted.
3 19 LABEL_A
3 37 LABEL_B
2 12 LABEL_C
1 15 LABEL_D
I have a list of values in "file 2" ~ 25000 unique lines:
Note -... (6 Replies)
Hi there,
A bit new to bash and am having an issue with a for loop. I look for filenames in a specified directory and pull the date string from each meeting a certain criteria, and then would like to make a directory for each date found, like this:
search 20180101.gz 20180102.gz 20180103.gz... (5 Replies)
Discussion started by: mwheeler12
5 Replies
LEARN ABOUT PHP
array_map
ARRAY_MAP(3) 1 ARRAY_MAP(3)array_map - Applies the callback to the elements of the given arraysSYNOPSIS
array array_map (callable $callback, array $array1, [array $...])
DESCRIPTION array_map(3) returns an array containing all the elements of $array1 after applying the $callback function to each one. The number of
parameters that the $callback function accepts should match the number of arrays passed to the array_map(3)PARAMETERS
o $callback
- Callback function to run for each element in each array.
o $array1
- An array to run through the $callback function.
o $...
- Variable list of array arguments to run through the $callback function.
RETURN VALUES
Returns an array containing all the elements of $array1 after applying the $callback function to each one.
EXAMPLES
Example #1
array_map(3) example
<?php
function cube($n)
{
return($n * $n * $n);
}
$a = array(1, 2, 3, 4, 5);
$b = array_map("cube", $a);
print_r($b);
?>
This makes $b have:
Array
(
[0] => 1
[1] => 8
[2] => 27
[3] => 64
[4] => 125
)
Example #2
array_map(3) using a lambda function (as of PHP 5.3.0)
<?php
$func = function($value) {
return $value * 2;
};
print_r(array_map($func, range(1, 5)));
?>
Array
(
[0] => 2
[1] => 4
[2] => 6
[3] => 8
[4] => 10
)
Example #3
array_map(3) - using more arrays
<?php
function show_Spanish($n, $m)
{
return("The number $n is called $m in Spanish");
}
function map_Spanish($n, $m)
{
return(array($n => $m));
}
$a = array(1, 2, 3, 4, 5);
$b = array("uno", "dos", "tres", "cuatro", "cinco");
$c = array_map("show_Spanish", $a, $b);
print_r($c);
$d = array_map("map_Spanish", $a , $b);
print_r($d);
?>
The above example will output:
// printout of $c
Array
(
[0] => The number 1 is called uno in Spanish
[1] => The number 2 is called dos in Spanish
[2] => The number 3 is called tres in Spanish
[3] => The number 4 is called cuatro in Spanish
[4] => The number 5 is called cinco in Spanish
)
// printout of $d
Array
(
[0] => Array
(
[1] => uno
)
[1] => Array
(
[2] => dos
)
[2] => Array
(
[3] => tres
)
[3] => Array
(
[4] => cuatro
)
[4] => Array
(
[5] => cinco
)
)
Usually when using two or more arrays, they should be of equal length because the callback function is applied in parallel to the corre-
sponding elements. If the arrays are of unequal length, shorter ones will be extended with empty elements to match the length of the long-
est.
An interesting use of this function is to construct an array of arrays, which can be easily performed by using NULL as the name of the
callback function
Example #4
Creating an array of arrays
<?php
$a = array(1, 2, 3, 4, 5);
$b = array("one", "two", "three", "four", "five");
$c = array("uno", "dos", "tres", "cuatro", "cinco");
$d = array_map(null, $a, $b, $c);
print_r($d);
?>
The above example will output:
Array
(
[0] => Array
(
[0] => 1
[1] => one
[2] => uno
)
[1] => Array
(
[0] => 2
[1] => two
[2] => dos
)
[2] => Array
(
[0] => 3
[1] => three
[2] => tres
)
[3] => Array
(
[0] => 4
[1] => four
[2] => cuatro
)
[4] => Array
(
[0] => 5
[1] => five
[2] => cinco
)
)
If the array argument contains string keys then the returned array will contain string keys if and only if exactly one array is passed. If
more than one argument is passed then the returned array always has integer keys.
Example #5
array_map(3) - with string keys
<?php
$arr = array("stringkey" => "value");
function cb1($a) {
return array ($a);
}
function cb2($a, $b) {
return array ($a, $b);
}
var_dump(array_map("cb1", $arr));
var_dump(array_map("cb2", $arr, $arr));
var_dump(array_map(null, $arr));
var_dump(array_map(null, $arr, $arr));
?>
The above example will output:
array(1) {
["stringkey"]=>
array(1) {
[0]=>
string(5) "value"
}
}
array(1) {
[0]=>
array(2) {
[0]=>
string(5) "value"
[1]=>
string(5) "value"
}
}
array(1) {
["stringkey"]=>
string(5) "value"
}
array(1) {
[0]=>
array(2) {
[0]=>
string(5) "value"
[1]=>
string(5) "value"
}
}
SEE ALSO array_filter(3), array_reduce(3), array_walk(3), information about the callback type.
PHP Documentation Group ARRAY_MAP(3)