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How to copy Docker images from one host to another without using a repository
...swered May 29 '14 at 17:09
DaiweiDaiwei
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Best way to test if a row exists in a MySQL table
... field, a non unique field.
I have made some tests with a TEXT field. Considering the fact that we have a table with 1M entries. 37 entries are equal to 'something':
SELECT * FROM test WHERE texte LIKE '%something%' LIMIT 1 with
mysql_num_rows() : 0.039061069488525s. (FASTER)
SELECT count(*) as ...
jQuery select2 get value of select tag?
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for an select called by id name instead of class name, use: $(".first").val()
– Rui Martins
Jun 21 '17 at 9:15
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LINQ to Entities only supports casting EDM primitive or enumeration types with IEntity interface
...extension method. I'm not sure why it works, though.
public static T GetById<T>(this IQueryable<T> collection, Guid id)
where T : class, IEntity
{
//...
}
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Push Notifications in Android Platform
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Google's official answer is the Android Cloud to Device Messaging Framework (deprecated) Google Cloud Messaging(deprecated) Firebase Cloud Messaging
It will work on Android >= 2.2 (on phones that have the Play Store).
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JQuery: How to call RESIZE event only once it's FINISHED resizing?
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Here is an example using thejh's instructions
You can store a reference id to any setInterval or setTimeout. Like this:
var loop = setInterval(func, 30);
// some time later clear the interval
clearInterval(loop);
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Foreign Key to non-primary key
...a UNIQUE constraint in another table.
So in your case if you make AnotherID unique, it will be allowed. If you can't apply a unique constraint you're out of luck, but this really does make sense if you think about it.
Although, as has been mentioned, if you have a perfectly good primary key as a ...
Nested attributes unpermitted parameters
...hing like
params.require(:person).permit(:name, :age, pets_attributes: [:id, :name, :category])
Some more details can be found in the Ruby edge API docs and strong_parameters on github or here
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How to change href of tag on button click through javascript
... f1();">jhhghj</a>
....or, the unobtrusive way:
<a href="#" id="abc">jhg</a>
<a href="#" id="myLink">jhhghj</a>
<script type="text/javascript">
document.getElementById("myLink").onclick = function() {
document.getElementById("abc").href="xyz.php";
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Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause?
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We can give a default value for the timestamp to avoid this problem.
This post gives a detailed workaround:
http://gusiev.com/2009/04/update-and-create-timestamps-with-mysql/
create table test_table(
id integer not null auto_increment primary key,
stamp_created timestamp ...