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How to get element by class name? [duplicate]
...use of its magic length property:
var arrFromList = Array.prototype.slice.call(y);
//or as per AntonB's comment:
var arrFromList = [].slice.call(y);
As yckart suggested querySelector('.foo') and querySelectorAll('.foo') would be preferable, though, as they are, indeed, better supported (93.99% vs...
rails simple_form - hidden field - create?
...t_comes_through_in_your_form
Where :method is the method that when called on the object results in the value you want
So following the example above:
= simple_form_for @movie do |f|
= f.hidden :title, "some value"
= f.button :submit
The code used in the example will reset the value ...
PHP: exceptions vs errors?
... of code that will insert a row into a database. It is possible that this call fails (duplicate ID) - you will want to have a "Error" which in this case is an "Exception". When you are inserting these rows, you can do something like this
try {
$row->insert();
$inserted = true;
} catch (Exc...
Git - Undo pushed commits
...t <previous label or sha1>
this will re-checkout all the updates locally (so git status will list all updated files)
then you "do your work" and re-commit your changes (Note: this step is optional)
git commit -am "blabla"
At this moment your local tree differs from the remote
git push ...
Javascript when to use prototypes
...he problem with JavaScript is that naked constructor functions require the caller to remember to prefix them with new or otherwise they typically don't work. There is no good reason for this. jQuery gets it right by hiding that nonsense behind an ordinary function, $, so you don't have to care how t...
Firefox session cookies
...ur tabs, and then you restore the browser and those tabs come back. That's called session restore. What I didn't realize is that it'll also restore all the session cookies for those pages too! It treats it like you had never closed the browser.
This makes sense in the sense that if your browser cra...
Numpy `logical_or` for more than two arguments
... 'logical_or'>
You can of course chain together multiple logical_or calls like this:
>>> x = np.array([True, True, False, False])
>>> y = np.array([True, False, True, False])
>>> z = np.array([False, False, False, False])
>>> np.logical_or(np.logical_or(x,...
Guaranteed lifetime of temporary in C++?
...for the lifetime of a temporary variable that is created within a function call but not used as a parameter? Here's an example class:
...
Is there a 'box-shadow-color' property?
... height: 30px;
box-shadow: 1px 1px 25px var(--box-shadow-color); /* Calling the variable */
}
.box-shadow:hover {
--box-shadow-color: #ff0000; /* Changing the value of the variable */
}
share
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What is scope/named_scope in rails?
... whats the advantages of this over say defining a method in the User Class called 'subscribedUsers'? e.g. 'def self.subscribedUsers self.where(:subscribed_to_newsletter => true) end
– redroot
Apr 29 '11 at 9:05
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