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Check if class already assigned before adding
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it's not possible to have duplicate class names in the class attribute by means of manipulating a DOM element via JavaScript. If you have class="collapse" in your HTML, calling Element.classList.add("collapse"); will not add an additional collapse class. I don't know the underlying implementation, ...
When is the thread pool used?
...resents back to the event loop that has been churning on without it in the meantime. All of this is abstracted away from you, the node developer, and some of it is abstracted away from the module developers through the use of libuv.
As pointed out by Denis Dollfus in the comments (from this answer...
Find all records which have a count of an association greater than zero
... To remove the duplicates, use
Project.joins(:vacancies).group('projects.id')
UPDATE:
As pointed out by @Tolsee, you can also use distinct.
Project.joins(:vacancies).distinct
As an example
[10] pry(main)> Comment.distinct.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, ...
Random Gaussian Variables
...2.0 * Math.PI * u2); //random normal(0,1)
double randNormal =
mean + stdDev * randStdNormal; //random normal(mean,stdDev^2)
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SQL join: selecting the last records in a one-to-many relationship
...mmend solving it:
SELECT c.*, p1.*
FROM customer c
JOIN purchase p1 ON (c.id = p1.customer_id)
LEFT OUTER JOIN purchase p2 ON (c.id = p2.customer_id AND
(p1.date < p2.date OR (p1.date = p2.date AND p1.id < p2.id)))
WHERE p2.id IS NULL;
Explanation: given a row p1, there should be no ro...
What is VanillaJS?
...ework-loving bosses or people who think you NEED to use a JS framework. It means you just use whatever your (for you own sake: non-legacy) browser gives you (using Vanilla JS when working with legacy browsers is a bad idea).
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Should I add .vcxproj.filter files to source control?
...e project file, and trigger a rebuild if it has changed - because that may mean there are different source files to build, or different settings, etc. I don't recall if we actually shipped with the build trigging that way, but the idea was that we did not want to trigger a rebuild simply because the...
what is the use of xsi:schemaLocation?
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@skaffman, Does it mean that when I run maven build of spring-based projhect with -o (offline) flag the build will fail despite the fact that all the dependencies are available in my local repository?
– aviad
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Can existing virtualenv be upgraded gracefully?
...ssuming Python has been upgraded in-place" ... this unfortunately seems to mean that if my system python3 points to 3.6, i can't create get python3 to point to 3.7 in my venv
– joel
Feb 16 at 17:33
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javascript find and remove object in array based on key value
...been trying several approaches on how to find an object in an array, where ID = var, and if found, remove the object from the array and return the new array of objects.
...