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What's the purpose of starting semi colon at beginning of JavaScript? [duplicate]
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The semi-colon is there in case you include this script just after some 'bad' script that doesn't properly close off its last line with a semi-colon. In this case it's possible the two scripts would be combined and result in invalid code. For example if you are merging mu...
Bash ignoring error for a particular command
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The solution:
particular_script || true
Example:
$ cat /tmp/1.sh
particular_script()
{
false
}
set -e
echo one
particular_script || true
echo two
particular_script
echo three
$ bash /tmp/1.sh
one
two
three will be never printed.
Also, I ...
Correct Bash and shell script variable capitalization
I run across many shell scripts with variables in all caps, and I've always thought that there is a severe misunderstanding with that. My understanding is that, by convention (and perhaps by necessity long ago), environment variables are in all-caps.
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Can I create a One-Time-Use Function in a Script or Stored Procedure?
...re a concept of a one-time-use, or local function declared inside of a SQL script or Stored Procedure? I'd like to abstract away some complexity in a script I'm writing, but it would require being able to declare a function.
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Is there a way to squash a number of commits non-interactively?
...h 3 'my commit message'
I recommend setting up aliases that actually run scripts so that it is easier to (a) code up your scripts and (b) do more complex work with error checking. Below is a script that does the work of squash and then below that is a script for setting up your git aliases.
Scr...
Link and execute external JavaScript file hosted on GitHub
When I try to change the linked reference of a local JavaScript file to a GitHub raw version my test file stops working. The error is:
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Use Expect in a Bash script to provide a password to an SSH command
I'm trying to use Expect in a Bash script to provide the SSH password. Providing the password works, but I don't end up in the SSH session as I should. It goes back strait to Bash.
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How can I scroll a web page using selenium webdriver in python?
...parse through facebook user friends page and extract all ids from the AJAX script. But I need to scroll down to get all the friends. How can I scroll down in Selenium. I am using python.
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Parallelize Bash script with maximum number of processes
...something
A more advanced example: Here we list of files that we want my_script to run on. Files have extension (maybe .jpeg). We want the output of my_script to be put next to the files in basename.out (e.g. foo.jpeg -> foo.out). We want to run my_script once for each core the computer has and...
PHP passing $_GET in linux command prompt
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Typically, for passing arguments to a command line script, you will use either argv global variable or getopt:
// bash command:
// php -e myscript.php hello
echo $argv[1]; // prints hello
// bash command:
// php -e myscript.php -f=world
$opts = getopt('f:');
echo $opts[...