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How to check if function exists in JavaScript?
...lder versions of IE treat certain functions as objects, e.g. typeof window.alert === 'object'.
– Noyo
Sep 4 '13 at 13:51
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How can I check whether a option already exist in select by JQuery
..."#your_select_id option[value=<enter_value_here>]").length == 0 ){
alert("option doesn't exist!");
}
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How to fix “Attempted relative import in non-package” even with __init__.py
...(described below by BrenBarn) needed to allow these imports for executable scripts (e.g. when using a shebang and doing ./my_script.py at the Unix shell) would all be useful. This whole issue was quite tricky for me to figure out or find concise and understandable documentation on.
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How to reliably open a file in the same directory as a Python script
...open files that were in the same directory as the currently running Python script by simply using a command like
5 Answers...
How do I get the path of the current executed file in Python?
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You can't directly determine the location of the main script being executed. After all, sometimes the script didn't come from a file at all. For example, it could come from the interactive interpreter or dynamically generated code stored only in memory.
However, you can relia...
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[...
The following sections have been defined but have not been rendered for the layout page “~/Views/Sha
...ur View.
If your _Layout.cshtml has something like this:
@RenderSection("scripts")
Then all Views that use that Layout must include a @section with the same name (even if the contents of the section are empty):
@{
ViewBag.Title = "Title";
Layout = "~/Views/Shared/_Layout.cshtml";
}
@sec...
How to detect if a script is being sourced
I have a script where I do not want it to call exit if it's being sourced.
17 Answers
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How to append something to an array?
...ar ar1 = [1, 2, 3];
var ar2 = [4, 5, 6];
var ar3 = ar1.concat(ar2);
alert(ar1);
alert(ar2);
alert(ar3);
The concat does not affect ar1 and ar2 unless reassigned, for example:
var ar1 = [1, 2, 3];
var ar2 = [4, 5, 6];
ar1 = ar1.concat(ar2);
alert(ar1);
Lots of great i...
Reverse of JSON.stringify?
...lo":"world"}';
var parsed = new Function('return ' + stringifiedJSON)();
alert(parsed.hello);
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