Questions related to if in awk context and if without awk context
I wrote this code, questions follow
Question 1 - how would I write this better so that my commands are executed under the else statement instead of getting a fatal error when $input is not a file in the Directory?
Question 2 - how would I represent this if statement outside this script and not within an awk command? When using if [ $input == echo$(ls) ] or if [[ $input == echo$(ls) ]]
where $input is a file name in the Directory I get a "too many arguments" and false return or just a false return respectively.
I know that this is a relative question but can someone give me an idea of what would be considered a high number of context switches?
I am running vmstat and show a cs value of between 5000 and 6000 on a 4 processor system. How can I deduce if this number is high or not?
Also, the timeslice... (2 Replies)
there are several same servers(process) on more than one server(machine) providing the same service.
we store session/context within the server(process), if the same client login, he will be directed to the very server service for him last time.
But, if a server(machine or process) down, the... (1 Reply)
Hi,
There's a file with below contents which I have to read based on the input parameter provided by the user.
FILE_ID=1
FILE_FTP_ID=ftp.server1.com
FILE_FTP_USER=user1
FILE_FTP_PASS=pass1
FILE_ID=2
FILE_FTP_ID=ftp.server2.com
FILE_FTP_USER=user2
FILE_FTP_PASS=pass2
FILE_ID=3... (6 Replies)
Hello,
I have a file that I want to be able to split at specific positions. For example in the file below I want to be able to split at every occurence of 2 at the start of a line, into multiple files.
2 abc PQRST
abcRSTG
2 cde FGKL
abcLKGRG
ABCLKgrg
2 lmn OPT
lmopqrst
uvwxyz
... (1 Reply)
Hi all,
I've got this question that i need to solve:
"Type `vmstat -s; vmstat -n 1 5; vmstat -n 1 5; vmstat
-s` to your Ruby interpreter. Then terminate your Ruby session. Run the Unix com-
mand vmstat -s; vmstat -n 1 5; vmstat -s in the same terminal window you had
been using for Ruby. Did... (1 Reply)
Ive got multiple PCs, sharing an NFS mounted home dir. For certain apps I would like to keep the config files host specific. Easy solution is to create symlinks to local folders for configs. Ideally I would still want the .config files to reside in the user home folder.
Is it possible to... (2 Replies)
In a kernel based on 2.6.27:
In the schedule() routine they have a local variable switch_count:
/*
* schedule() is the main scheduler function.
*/
asmlinkage void __sched schedule(void)
{
struct task_struct *prev, *next;
unsigned long *switch_count;
struct rq... (2 Replies)
If suppose a middle level interrupt is being serviced and a high priority interrupts comes in then in that case what all process will take place.
The interrupt context switch will happen. But where will the interrupt context be saved?
Is there something called as part process data area? (4 Replies)
Hi
Just wondering ... do you have an example of context that would demonstrates how usefull the awk notation can efficiently be used ?
Thx :rolleyes: (6 Replies)
Discussion started by: ctsgnb
6 Replies
LEARN ABOUT PHP
echo
ECHO(3) 1 ECHO(3)echo - Output one or more stringsSYNOPSIS
void echo (string $arg1, [string $...])
DESCRIPTION
Outputs all parameters.
echo is not actually a function (it is a language construct), so you are not required to use parentheses with it. echo (unlike some other
language constructs) does not behave like a function, so it cannot always be used in the context of a function. Additionally, if you want
to pass more than one parameter to echo, the parameters must not be enclosed within parentheses.
echo also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. Prior to PHP 5.4.0, this short syn-
tax only works with the short_open_tag configuration setting enabled.
I have <?=$foo?> foo.
PARAMETERS
o $arg1
- The parameter to output.
o $...
-
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
echo examples
<?php
echo "Hello World";
echo "This spans
multiple lines. The newlines will be
output as well";
echo "This spans
multiple lines. The newlines will be
output as well.";
echo "Escaping characters is done "Like this".";
// You can use variables inside of an echo statement
$foo = "foobar";
$bar = "barbaz";
echo "foo is $foo"; // foo is foobar
// You can also use arrays
$baz = array("value" => "foo");
echo "this is {$baz['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
echo 'foo is $foo'; // foo is $foo
// If you are not using any other characters, you can just echo variables
echo $foo; // foobar
echo $foo,$bar; // foobarbarbaz
// Some people prefer passing multiple parameters to echo over concatenation.
echo 'This ', 'string ', 'was ', 'made ', 'with multiple parameters.', chr(10);
echo 'This ' . 'string ' . 'was ' . 'made ' . 'with concatenation.' . "
";
echo <<<END
This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
// Because echo does not behave like a function, the following code is invalid.
($some_var) ? echo 'true' : echo 'false';
// However, the following examples will work:
($some_var) ? print 'true' : print 'false'; // print is also a construct, but
// it behaves like a function, so
// it may be used in this context.
echo $some_var ? 'true': 'false'; // changing the statement around
?>
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
SEE ALSO print(3), printf(3), flush(3), Heredoc syntax.
PHP Documentation Group ECHO(3)