I want to run an awk split on a value that has been pushed through an array and I was wondering what the syntax should be??
e.g. running time strings through an array and trying to examine just minutes:
12:25:30
10:15:13
08:55:23
awk '
NR==FNR{
... (2 Replies)
I have a array as
CArray=( a1 a2 )
and a1,a2,a3 are also array as:
a1=(1 2 3)
a2=(3 4 5)
now I have this in my code:
for i in `echo "${CArray}"`
do
echo ${$i}
done
It is giving error as :"bad substitution"
It should give me value as
1 2 3
3 4 5
how can I get this...Can u please... (2 Replies)
Hi,
I have the following lines that I would like to see in an array for easy comparisons and printing:
Example 1:
field1,field2,field3,field4,field5
value1,value2,value3,value4,value5Example 2:
field1,field3,field4,field2,field5,field6,field7... (7 Replies)
Dear All,
I have been trying to do a simple task of extracting 2 fields from the file (3 rows) and store it in an array variable. I tried with:
#! /bin/bash
ch=`cut -f10 tmp.txt`
counter=0
for p in $pid
do
c=${ch}
echo "$c ..$counter"
counter=$((counter+1))... (2 Replies)
Am using a find command in my script .The output may be one or more. I need to store those values in a array and need to access those. Am unable to find the solution . Any help on this will be helpful.
if
< code>
else a=<find command output which gives the file name either 1 or more>
if 1... (1 Reply)
Hi,
I need to update rows in a table based on the values in an array variable.
code is :
while read line
do
error_msg="$(echo $line)"
index=`expr $index+1`
done <"logs/$ffile"
rows_count=${#error_msg
}
i=0
while
do
echo "error msgs is... (2 Replies)
I am new to ksh scripting, specially array. How do i get values from an array and set the value as variable and pass those variables to the different functions??
someone taught me how to get input from a file with have columns i need to read, but now i doesnt know how to set those value to be a... (7 Replies)
Hello All,
Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....?
I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping
through a string containing some of these "Illegal Characters". Now... (5 Replies)
Hi All,
Need a help. I am just learning Shell scripting. Need a requirement like to attach variable to array values. Value of from is AF and to is AD.
froml=$(echo $from | tr '' '')
tol=$(echo $to | tr '' '')
Schemas=(AWQM WFCONTROLLER PROVCO PRISM)
for s in "${Schemas}"
do
... (3 Replies)
Discussion started by: pvmanikandan
3 Replies
LEARN ABOUT PHP
unset
UNSET(3) 1 UNSET(3)unset - Unset a given variableSYNOPSIS
void unset (mixed $var, [mixed $...])
DESCRIPTION unset(3) destroys the specified variables.
The behavior of unset(3) inside of a function can vary depending on what type of variable you are attempting to destroy.
If a globalized variable is unset(3) inside of a function, only the local variable is destroyed. The variable in the calling environment
will retain the same value as before unset(3) was called.
<?php
function destroy_foo()
{
global $foo;
unset($foo);
}
$foo = 'bar';
destroy_foo();
echo $foo;
?>
The above example will output:
bar
To unset(3) a global variable inside of a function, then use the $GLOBALS array to do so:
<?php
function foo()
{
unset($GLOBALS['bar']);
}
$bar = "something";
foo();
?>
If a variable that is PASSED BY REFERENCE is unset(3) inside of a function, only the local variable is destroyed. The variable in the
calling environment will retain the same value as before unset(3) was called.
<?php
function foo(&$bar)
{
unset($bar);
$bar = "blah";
}
$bar = 'something';
echo "$bar
";
foo($bar);
echo "$bar
";
?>
The above example will output:
something
something
If a static variable is unset(3) inside of a function, unset(3) destroys the variable only in the context of the rest of a function. Fol-
lowing calls will restore the previous value of a variable.
<?php
function foo()
{
static $bar;
$bar++;
echo "Before unset: $bar, ";
unset($bar);
$bar = 23;
echo "after unset: $bar
";
}
foo();
foo();
foo();
?>
The above example will output:
Before unset: 1, after unset: 23
Before unset: 2, after unset: 23
Before unset: 3, after unset: 23
PARAMETERS
o $var
- The variable to be unset.
o $...
- Another variable ...
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
unset(3) example
<?php
// destroy a single variable
unset($foo);
// destroy a single element of an array
unset($bar['quux']);
// destroy more than one variable
unset($foo1, $foo2, $foo3);
?>
Example #2
Using (unset) casting
(unset) casting is often confused with the unset(3) function. (unset) casting serves only as a NULL-type cast, for completeness. It
does not alter the variable it's casting.
<?php
$name = 'Felipe';
var_dump((unset) $name);
var_dump($name);
?>
The above example will output:
NULL
string(6) "Felipe"
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Note
It is possible to unset even object properties visible in current context.
Note
It is not possible to unset $this inside an object method since PHP 5.
Note
When using unset(3) on inaccessible object properties, the __unset() overloading method will be called, if declared.
SEE ALSO isset(3), empty(3), __unset(), array_splice(3).
PHP Documentation Group UNSET(3)