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Else clause on Python while statement
...as an if/else construct with respect to the condition:
if condition:
handle_true()
else:
handle_false()
is analogous to the looping construct:
while condition:
handle_true()
else:
# condition is false now, handle and go on with the rest of the program
handle_false()
An exam...
Is there a way to use shell_exec without waiting for the command to complete?
...; /dev/null 2>/dev/null &');
Note this also gets rid of the stdio and stderr.
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What components are MVC in JSF MVC framework?
In JSF MVC framework who is Model, View, and Controller?
4 Answers
4
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Checking for empty arrays: count vs empty
...y, was empty — i.e., as though it had no elements). This is problematic, and another example of PHP being too forgiving.
– Matthew Slyman
Apr 5 '17 at 4:59
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Relative URL to a different port number in a hyperlink?
...
It would be nice if this could work, and I don't see why not because : is a reserved character for port separation inside the URI component, so the browser could realistically interpret this as a port relative to this URL, but unfortunately it doesn't and there'...
Difference between subprocess.Popen and os.system
What is the difference between subprocess.Popen() and os.system() ?
5 Answers
5
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How to convert timestamps to dates in Bash?
I need a shell command or script that converts a Unix timestamp to a date. The input can come either from the first parameter or from stdin, allowing for the following usage patterns:
...
How to use 'cp' command to exclude a specific directory?
...xcept some files in a specific sub-directory.
I have noticed that cp command didn't have the --exclude option.
So, how can I achieve this?
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Why is the asterisk before the variable name, rather than after the type?
...
perhaps but I wouldn't mix and match types in one declaration.
– BobbyShaftoe
Dec 30 '08 at 3:13
17
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Can I export a variable to the environment from a bash script without sourcing it?
...to have the script, rather than setting an environment variable, print commands that will set the environment variable:
$ cat set-vars2.sh
#!/bin/bash
echo export FOO=BAR
$ eval "$(./set-vars2.sh)"
$ echo "$FOO"
BAR
A third approach is to have a script that sets your environment variable(s) inter...