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Difference between no-cache and must-revalidate
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I believe that must-revalidate means :
Once the cache expires, refuse to return stale responses to the user
even if they say that stale responses are acceptable.
Whereas no-cache implies :
must-revalidate plus the fact the response becomes stal...
Is there a difference between /\s/g and /\s+/g?
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\s means "one space", and \s+ means "one or more spaces".
But, because you're using the /g flag (replace all occurrences) and replacing with the empty string, your two expressions have the same effect.
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How to write a:hover in inline CSS?
...ts to apply the style.
:hover is a pseudo-selector and, for CSS, only has meaning within the style sheet. There isn't any inline-style equivalent (as it isn't defining the selection criteria).
Response to the OP's comments:
See Totally Pwn CSS with Javascript for a good script on adding CSS rule...
What exactly is Hot Module Replacement in Webpack?
...every module. If a module has no HMR handlers, the update bubbles up. This means a single handler can handle updates for a complete module tree. If a single module in this tree is updated, the complete module tree is reloaded (only reloaded, not transferred).
From the HMR runtime view (technical)
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difference between iframe, embed and object elements
... you can get the context of the child from the parent and vice versa. This means they you can use scripts in the parent to manipulate the child etc. That part is not possible with <object> or <iframe> where you would have to set up some other mechanism instead, such as the JavaScript pos...
Difference between PCDATA and CDATA in DTD
...model says that an element may contain plain text. The "parsed" part of it means that markup (including PIs, comments and SGML directives) in it is parsed instead of displayed as raw text. It also means that entity references are replaced.
Another type of content model allowing plain text contents ...
How to implement has_many :through relationships with Mongoid and mongodb?
...tingNote
include Mongoid::Document
embedded_in :appointment
end
This means that you can retrieve the notes together with an appointment all together, whereas you would need multiple queries if this was an association. You just have to bear in mind the 16MB size limit for a single document whic...
How to make a floated div 100% height of its parent?
...: absolute;
}
Explanation: The .right div is absolutely positioned. That means that its width and height, and top and left positiones will be calculed based on the first parent div absolutely or relative positioned ONLY if width or height properties are explicitly declared in CSS; if they aren't e...
What's the best way to communicate between view controllers?
... context of the "dependency injection" design pattern. In a nutshell, this means that your controller shouldn't "look up" the objects it needs to do its job (e.g., reference a global variable). Instead, you should always "inject" those dependencies into the controller (i.e., pass in the objects it n...
How can I select an element with multiple classes in jQuery?
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@Shimmy: Yes. A space between two selectors means you're searching for descendants; i.e. .a .b searches for elements with class b that are descendants of an element with class a. So something like div a will only return a elements that are inside a div element.
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