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CSS: Change image src on img:hover
...ehaviour. Sometimes it's important to have image element on the page, e.g. for accessibility requirements, but then it's better to show/hide two image elements with css. In most cases it's a bad idea to change image's src attribute with JS, try to use background-image if you can.
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How to get key names from JSON using jq
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You need to use jq 'keys[]'. For example:
echo '{"example1" : 1, "example2" : 2, "example3" : 3}' | jq 'keys[]'
Will output a line separated list:
"example1"
"example2"
"example3"
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Database development mistakes made by application developers [closed]
...indices
This is a relatively easy one but still it happens all the time. Foreign keys should have indexes on them. If you're using a field in a WHERE you should (probably) have an index on it. Such indexes should often cover multiple columns based on the queries you need to execute.
2. Not enfo...
Fragment onCreateView and onActivityCreated called twice
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I was scratching my head about this for a while too, and since Dave's explanation is a little hard to understand I'll post my (apparently working) code:
private class TabListener<T extends Fragment> implements ActionBar.TabListener {
private Fragment...
How to get Spinner value?
...o the user), but not its value if you mapped an int array onto the spinner for example.
– A. Steenbergen
Feb 5 '15 at 13:58
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android edittext onchange listener
...done button (this depends on your implementation and on what fits the best for you).
Second, you can't get an EditText instance within the TextWatcher only if you have declared the EditText as an instance object. Even though you shouldn't edit the EditText within the TextWatcher because it is not s...
Is an entity body allowed for an HTTP DELETE request?
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The spec does not explicitly forbid or discourage it, so I would tend to say it is allowed.
Microsoft sees it the same way (I can hear murmuring in the audience), they state in the MSDN article about the DELETE Method of ADO.NET Data Services Framework:...
ASP.NET MVC partial views: input name prefixes
...by this :
using System.Web.Mvc.Html
public static MvcHtmlString PartialFor<TModel, TProperty>(this HtmlHelper<TModel> helper, System.Linq.Expressions.Expression<Func<TModel, TProperty>> expression, string partialViewName)
{
string name = ExpressionHelper.GetEx...
How to leave a message for a github.com user
...ances you may reach your goal. Indeed, within each commit is stored some information about the author of the change or the one who accepted it.
Provided you're really dying to exchange with user user_test
Display the public activity page of the user: https://github.com/user_test?tab=activity
Sear...
Getting the parent div of element
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You're looking for parentNode, which Element inherits from Node:
parentDiv = pDoc.parentNode;
Handy References:
DOM2 Core specification - well-supported by all major browsers
DOM2 HTML specification - bindings between the DOM and HTML
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