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How to do this using jQuery - document.getElementById(“selectlist”).value
In jQuery, what is the equivalent to document.getElementById("selectlist").value ?
6 Answers
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Algorithm to return all combinations of k elements from n
...l come across is of course memory and pretty quickly, you'll have problems by 20 elements in your set -- 20C3 = 1140. And if you want to iterate over the set it's best to use a modified gray code algorithm so you aren't holding all of them in memory. These generate the next combination from the prev...
Laravel - Eloquent or Fluent random row
.../ The amount of items you wish to receive
Laravel 4.2.7 - 5.1:
User::orderByRaw("RAND()")->get();
Laravel 4.0 - 4.2.6:
User::orderBy(DB::raw('RAND()'))->get();
Laravel 3:
User::order_by(DB::raw('RAND()'))->get();
Check this article on MySQL random rows. Laravel 5.2 supports this, for ol...
Why should I use Deque over Stack?
...rate etc - and that's it. There's deliberately no way to access an element by position, which Stack exposes because it's a subclass of Vector.
Oh, and also Stack has no interface, so if you know you need Stack operations you end up committing to a specific concrete class, which isn't usually a good...
How does Activity.finish() work in Android?
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Then how to finish an activity which is called by StartAvtivityforResults() without completion?
– Ayush Pateria
Feb 2 '12 at 12:12
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What's the best way to store Phone number in Django models
...ually look into the internationally standardized format E.164, recommended by Twilio for example (who have a service and an API for sending SMS or phone-calls via REST requests).
This is likely to be the most universal way to store phone numbers, in particular if you have international numbers wor...
PHP “php://input” vs $_POST
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This is because these are the only content types that must be supported by user agents. So the server and PHP traditionally don't expect to receive any other content type (which doesn't mean they couldn't).
So, if you simply POST a good old HTML form, the request looks something like this:
POST...
Change the name of the :id parameter in Routing resources for Rails
...ram: :slug
# app/controllers/posts_controller.rb
# ...
@post = Post.find_by(slug: params[:slug])
# ...
As of the release of Rails 4, this functionality is documented in the Rails Guides.
Rails 3
Unfortunately, in Rails 3, the :key option for resources was removed, so you can no longer easily c...
How do I revert a Git repository to a previous commit?
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This depends a lot on what you mean by "revert".
Temporarily switch to a different commit
If you want to temporarily go back to it, fool around, then come back to where you are, all you have to do is check out the desired commit:
# This will detach your HEAD, t...
Change date of git tag (or GitHub Release based on it)
I'm adding Releases to my projects on GitHub by adding tags to various commits in the Main branch.
3 Answers
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