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Does “display:none” prevent an image from loading?
...
Browsers are getting smarter. Today your browser (depending on the version) might skip the image loading if it can determine it's not useful.
The image has a display:none style but its size may be read by the script.
Chrome v68.0 does not load images if the parent is hidden.
You may check it ...
How can I use pointers in Java?
... and you can use them like pointers.
abstract class Animal
{...
}
class Lion extends Animal
{...
}
class Tiger extends Animal
{
public Tiger() {...}
public void growl(){...}
}
Tiger first = null;
Tiger second = new Tiger();
Tiger third;
Dereferencing a null:
first.growl(); // ERROR, first...
What is href=“#” and why is it used?
...mewhere. Hyperlinks require the href property, because it specifies a location.
Hash:
A hash - # within a hyperlink specifies an html element id to which the window should be scrolled.
href="#some-id" would scroll to an element on the current page such as <div id="some-id">.
href="//sit...
What is “lifting” in Haskell?
...an short-circuit this by writing the unwrap-and-wrap code once. This function is traditionally called a "lift" because it looks like this:
liftFoo2 :: (a -> b -> c) -> Foo a -> Foo b -> Foo c
In other words you have a function which takes a two-argument function (such as the (+) o...
parseInt vs unary plus, when to use which?
...her hand stops parsing when it sees a non-numerical character, like the period that is intended to be a decimal point ..
+'2.3' === 2.3; //true
parseInt('2.3',10) === 2; //true
parseInt and parseFloat parses and builds the string left to right. If they see an invalid character, it re...
How to organize a node app that uses sequelize?
... initialize the model in the file but just to provide the necesary information for its initialization and let a centralized module take care of the models setup and instantiation.
So the steps are:
Have several Model files with data about the model, like fields, relationships and options.
Have a si...
Are Databases and Functional Programming at odds?
... developer for some time now, and have recently started learning some functional programming. Like others, I've had some significant trouble apply many of these concepts to my professional work. For me, the primary reason for this is I see a conflict between between FP's goal of remaining stateles...
Blocks and yields in Ruby
....
When a method expects a block, it invokes it by calling the yield function.
This is very handy, for instance, to iterate over a list or to provide a custom algorithm.
Take the following example:
I'm going to define a Person class initialized with a name, and provide a do_with_name method th...
In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
...
See this answer.
In summary make a destination with
<a name="sometext"></a>
inserted anywhere in your markdown markup (for example in a header:
## heading<a name="headin"></a>
and link to it using the markdown linkage:
[This is the link ...
SecurityError: Blocked a frame with origin from accessing a cross-origin frame
...age() can be '*' to indicate no preference about the origin of the destination. A target origin should always be provided when possible, to avoid disclosing the data you send to any other site.
In your <iframe> (contained in the main page):
window.addEventListener('message', event => {
...