Hi.
I'm new to this forum, my English perhaps is not so good, but here is my question:
In bash you can use [[ ]] for tests, and how I understand it the variable names should be expanded automatically. So this should give "yes":
Code:
xx=hello
$ [[ xx == hello ]] && echo yes || echo no
no # not giving "yes"
These two are however working:
Code:
$ [[ $xx == hello ]] && echo yes || echo no
yes # correct
# and
nn=77
$ [[ nn -eq 77 ]] && echo yes || echo no
yes # correct
Why isn't the variable expansion working for strings? Or I missed something?
Hi,
I was trying to use this particular option of grep
grep -r 'Search_pattern' *
This command should ideally search all the occurrences of Search_pattern recursively within a directory & print it on shell prompt. But this command is not doing what is expected. It just displays nothin!
... (8 Replies)
Hi,
I am trying to figure out which version I am running of sendmail, but I am buffed.
This is what I get
sendmail -d0.1 -bt < /dev/null
sendmail: illegal option -- d
Telneting to my host:
~]$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is... (1 Reply)
#! /usr/tsch
foreach f (`cat contacts.list`)
awk '{printf ($2 in a) ? ","$5 : (NR>1) ? RS $2 FS $5 : $2 FS $5; a} END{print e}' $f > $f_inter.map
end
My file: cat contacts.list is just a list of files.
I get this error:
doit_contacts2intermap.sh: Command not found.
Thanks! (1 Reply)
Greetings all. :)
I would like to use sed to join all non-blank lines together in a particular file. I was thinking I could do this by simply replacing the terminating, new-line character on every line which is not blank, but I must be missing something in my sed line:
$ sed... (3 Replies)
This is the code:
while test 1 -eq 1
do
read a
$a
if test $a = stop
then
break
fi
done
I read a command on every loop an execute it.
I check if the string equals the word stop to end the loop,but it say that I gave too many arguments to test.
For example echo hello.
Now the... (1 Reply)
awk 'BEGIN{print '1.2449'**0.5}'
awk: line 1: syntax error at or near *
can someone help me troubleshoot the above command?
i'm trying to do the square root of 1.2449. this command works on Red Hat, but for some reasonn isn't working on kubuntu (latest version).
shell is bash.
i... (3 Replies)
hi gurus.
I have a little script that runs java from a certain directory. This script runs fine when run manually but when I try to schedule it, it fails to find the script.
little_script.sh..
/<directory of java>/java -classpath... (3 Replies)
Hi
I want export input data ...
echo "month: "
read m
export m=$m
also export m is not working ?
the month-variable should be exportet for the use in other scripts,
but it is not working like this. What i'm doing wrong?
Thanks in advance!
IMPe (10 Replies)
Hi All,
I've tried starting syslogd on our hp-ux 11.31 server. However, it is not getting started nor it is updating the syslog file.
There is no space issue also. However, the mail.log file is approx 2GB, can that be of any issue. Please find the details below:
# /sbin/init.d/syslogd... (2 Replies)
Discussion started by: Kits
2 Replies
LEARN ABOUT PHP
boolval
BOOLVAL(3) 1 BOOLVAL(3)boolval - Get the boolean value of a variableSYNOPSIS
boolean boolval (mixed $var)
DESCRIPTION
Returns the boolean value of $var.
PARAMETERS
o $var
- The scalar value being converted to a boolean.
RETURN VALUES
The boolean value of $var.
EXAMPLES
Example #1
boolval(3) examples
<?php
echo '0: '.(boolval(0) ? 'true' : 'false')."
";
echo '42: '.(boolval(42) ? 'true' : 'false')."
";
echo '0.0: '.(boolval(0.0) ? 'true' : 'false')."
";
echo '4.2: '.(boolval(4.2) ? 'true' : 'false')."
";
echo '"": '.(boolval("") ? 'true' : 'false')."
";
echo '"string": '.(boolval("string") ? 'true' : 'false')."
";
echo '"0": '.(boolval("0") ? 'true' : 'false')."
";
echo '"1": '.(boolval("1") ? 'true' : 'false')."
";
echo '[1, 2]: '.(boolval([1, 2]) ? 'true' : 'false')."
";
echo '[]: '.(boolval([]) ? 'true' : 'false')."
";
echo 'stdClass: '.(boolval(new stdClass) ? 'true' : 'false')."
";
?>
The above example will output:
0: false
42: true
0.0: false
4.2: true
"": false
"string": true
"0": false
"1": true
[1, 2]: true
[]: false
stdClass: true
SEE ALSO floatval(3), intval(3), strval(3), settype(3), is_bool(3), Type juggling.
PHP Documentation Group BOOLVAL(3)