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CSS :after not adding content to certain elements
...</before>Content of span<after></after></span>
Evidently, that won't work with <img src="" />.
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Best way to get child nodes
...ike this <td\n\t>content</td>. As you might do with XML, to avoid excess whitespace being regarded as part of the data (or DOM, in this case). Why would whitespace inside a tag be included in the DOM?
– Elias Van Ootegem
Apr 30 '12 at 10:42
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Why are Objective-C delegates usually given the property assign instead of retain?
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The reason that you avoid retaining delegates is that you need to avoid a retain cycle:
A creates B
A sets itself as B's delegate
…
A is released by its owner
If B had retained A, A wouldn't be released, as B owns A, thus A's dealloc would neve...
Clojure differences between Ref, Var, Agent, Atom, with examples
...duce a short snip-it of the motivations for each:
start by watching this video on the notion of Identity and/or studying here.
Refs are for Coordinated Synchronous access to "Many Identities".
Atoms are for Uncoordinated synchronous access to a single Identity.
Agents are for Uncoordinated asynch...
How to throw a C++ exception
...int a, int b ) {
if ( a < 0 || b < 0 ) {
throw std::invalid_argument( "received negative value" );
}
}
The Standard Library comes with a nice collection of built-in exception objects you can throw. Keep in mind that you should always throw by value and catch by reference:
t...
Reordering of commits
...then run git rebase --continue to move on. These instructions are also provided by the error message printed when the conflict occurs.
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addEventListener vs onclick
... of events to any single element. The only practical limitation is client-side memory and other performance concerns, which are different for each browser.
The examples above represent using an anonymous function[doc]. You can also add an event listener using a function reference[doc] or a closure[...
Passing current scope to an AngularJS Service
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@Caio Cunha Could you expand on why it's not a good idea to pass a scope? I'm having exactly this issue, I want to add some stuff to $scope via a call to a service using an async executeSql() function. Looking into 3 options (1) use a callback on the async function, then call ...
All falsey values in JavaScript
...= false.
This is one of the reasons why many developers and many style guides (e.g. standardjs) prefer === and almost never use ==.
Truthy values that actually == false
"Truthy" simply means that JavaScript's internal ToBoolean function returns true. A quirk of Javascript to be aware of (and ...
When to use nested classes and classes nested in modules?
...y a difference in name.
As for your second observation, classes nested inside of modules are generally used to namespace the classes. For instance:
module ActiveRecord
class Base
end
end
differs from
module ActionMailer
class Base
end
end
Although this is not the only use of classes n...