This will give you the array var. You can access the values in var via
$(...) means run the command between the braces and give me the result.
var=( $(...) ) means run the command between the braces and save the result in an array called var. So should be able to capture the output from any command this way.
For an explanation of [[ -s ... ]] see
[[ ... ]] && ... || ...
is a short form of if ... then ... else.
If you have other questions you should open a new post a give an exact description of your problem and your goal.
Hi all,
My boss wants me to find out how often e-m users are accessing their account:confused:. The mail server keeps log of all logins. I want to use grep the 'usernames', but it should come out the moment it first encounters the username in the log. Can I do that? I want to avoid 10+ greps... (2 Replies)
I have seen this used several times but not really sure of what it actually does. I am confused with the second grep as the argument to the first.
some commands | grep -v grep | some other commands
Can anyone provide an explanation?
Thanks, (5 Replies)
Never mind, I did more research, and now am using grep -v './temp/', dumping it into a new text file, then using mv -f to make that the original file. Thanks for reading!
---------------
Hi folks, I haven't done any scripting in years, and now I have a problem. Our backup tapes are filling... (0 Replies)
Hello. I'm a complete newbie to C programming. I have a C program that wasn't written by me where I need to write some wrappers around it to automate and make it easier for a client to use. The problem is that the program accepts standard input to control the program... I'm hoping to find a simple... (6 Replies)
How come grep testfile1 won't find anything in testfile1 (even though the characters sd are there in great quantity), but grep '' testfile1 will find plenty?
Do the single quotes prevent the shell from interpreting the testfile1 is interpreted as: grep *test whether or not characters sd exist*... (5 Replies)
This should be so easy...
I want to find all the apps in /Applications that start with the lower case i (e.g. iTunes.app, iSync.app, iCal.app) They should all have the .app extension. I've tried:
ls /Applications |grep -o i*.app
ls /Applications/i*.app
Anyhow, I just want to see what apps... (2 Replies)
I'm trying to write a simple script to identify every user who tried to “sudo” on the system. I have the first portion down to grep the log file
grep “sudo” /var/log/secure.
What I want to do is have the script identify the person just one time not every instance the user tried... (4 Replies)
I hope someone can help me.
I have a folder e.g. /opt/application
Under that are many sub folders e.g.
Folder1
Folder2
Folder3
Folder4
Folder5
Folder6
etc
In some of these fodlers (not all of them) is a file called errors.log
I need to run a grep that will start at... (3 Replies)
Cheers!
In /etc/syslog.conf, if an error type is not specified, is it logged anywhere (most preferable is it logged to /var/log/messages) or not?
To be more precise I am interested in error and critical level messages. At default these errors are not specified in syslog.conf, and I need to... (6 Replies)
Discussion started by: dr1zzt3r
6 Replies
LEARN ABOUT PHP
floatval
FLOATVAL(3) 1 FLOATVAL(3)floatval - Get float value of a variableSYNOPSIS
float floatval (mixed $var)
DESCRIPTION
Gets the float value of $var.
PARAMETERS
o $var
- May be any scalar type. floatval(3) should not be used on objects, as doing so will emit an E_NOTICE level error and return 1.
RETURN VALUES
The float value of the given variable. Empty arrays return 0, non-empty arrays return 1.
Strings will most likely return 0 although this depends on the leftmost characters of the string. The common rules of float casting apply.
EXAMPLES
Example #1
floatval(3) Example
<?php
$var = '122.34343The';
$float_value_of_var = floatval($var);
echo $float_value_of_var; // 122.34343
?>
Example #2
floatval(3) non-numeric leftmost characters Example
<?php
$var = 'The122.34343';
$float_value_of_var = floatval($var);
echo $float_value_of_var; // 0
?>
SEE ALSO boolval(3), intval(3), strval(3), settype(3), Type juggling.
PHP Documentation Group FLOATVAL(3)