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How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
...now() - INTERVAL 900 SECOND
To
DELETE FROM onlineusers
WHERE id IN (
SELECT id FROM onlineusers
WHERE datetime <= now() - INTERVAL 900 SECOND
ORDER BY id
) u;
Another thing to keep in mind is that mysql documentation suggest that in case of a deadlock the client should retry autom...
MySQL error 1449: The user specified as a definer does not exist
...finer for views
Run this SQL to generate the necessary ALTER statements
SELECT CONCAT("ALTER DEFINER=`youruser`@`host` VIEW ",
table_name, " AS ", view_definition, ";")
FROM information_schema.views
WHERE table_schema='your-database-name';
Copy and run the ALTER statements
How to change the...
How to get the index of an item in a list in a single step?
...g different (e.g. on top of any IEnumerable<>).
Use the overload of Select which takes an index in the predicate, so you transform your list into an (index, value) pair:
var pair = myList.Select((Value, Index) => new { Value, Index })
.Single(p => p.Value.Prop == oProp...
How do I delete a Discipline in EPF Composer 1.5?
... I understand what you are looking for can be done through Configurations (select OpenUP in your Library view) and published View definitions.
See slide 83 and 84 of this PPT document. You should be able to take it from there.
An Introduction to the Eclipse Process Framework.
In case the link doe...
AngularJs: How to check for changes in file input fields?
...er="form-cntlr">
<form>
<button ng-click="selectFile()">Upload Your File</button>
<input type="file" style="display:none"
id="file" name='file' onchange="angular.element(this).scope().fileNameChanged(this)" />
<...
Apply style to only first level of td tags
...>tr>td { border: solid 1px red; }
But! The ‘>’ direct-child selector does not work in IE6. If you need to support that browser (which you probably do, alas), all you can do is select the inner element separately and un-set the style:
.MyClass td { border: solid 1px red; }
.MyClass td...
How do I create a category in Xcode 6 or higher?
...ey just moved it without telling anyone.
Click File -> New -> File
Select Objective-C file under Sources in iOS or Mac OS respectively and Click Next
Now under File Type: choose either Category, Protocol, or Extension
PS. Under File Name: whatever you type here will be either the Category,...
What does collation mean?
... is a correctly ordered list:
Namibia
número
ñandú
ñú
obra
ojo
By selecting the correct collation, you get all this done for you, automatically :-)
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Why can't I see the “Report Data” window when creating reports?
...ther answer, make sure you have a report open and are currently "focused" (selected) on some part of the report! Then, and ONLY THEN, will it show up in the menu and be accessible via the shortcut!
– D.R.
Jul 15 '14 at 17:55
...
Xcode 4, Core Data Model Version - Set Current Version
...d "View" button at the top right of the window).
In the Utilities sidepane select the File inspector (little paper icon on the top left)
You will see "Versioned Core Data Model" as a group so just change the "Current" drop-down to your new version.
...