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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
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Quite likely your sourcecodes_tags table contains sourcecode_id values that no longer exists in your sourcecodes table. You have to get rid of those first.
Here's a query that can find those IDs:
SELECT DISTINCT sourcecode_id FROM
sourcecodes_tags tags LEFT JOIN sourcecodes sc ON...
Injecting $state (ui-router) into $http interceptor causes circular dependency
...ld be the same, you inject the $injector service into your interceptor and call $injector.get() where you need to get the $state service.
– Jonathan Palumbo
Dec 15 '14 at 19:58
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How do I add a Fragment to an Activity with a programmatically created content view
...han one problem with that code. A fragment cannot be declared that way, inside the same java file as the activity but not as a public inner class. The framework expects the fragment's constructor (with no parameters) to be public and visible. Moving the fragment into the Activity as an inner class, ...
How do I change an HTML selected option using JavaScript?
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Change
document.getElementById('personlist').getElementsByTagName('option')[11].selected = 'selected'
to
document.getElementById('personlist').value=Person_ID;
share
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no gravity for scrollview. how to make content inside scrollview as center
I want the content inside the scrollView as center.
7 Answers
7
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Why does MYSQL higher LIMIT offset slow the query down?
...ecords. It needs to check and count each record on its way.
Assuming that id is a PRIMARY KEY of a MyISAM table, you can speed it up by using this trick:
SELECT t.*
FROM (
SELECT id
FROM mytable
ORDER BY
id
LIMIT 10000, 30
) q
JOIN ...
Remove duplicates in the list using linq
I have a class Items with properties (Id, Name, Code, Price) .
11 Answers
11
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import module from string variable
...rn instance
And everytime I want to reload a new instance I just have to call getInstance() like this:
myInstance = getInstance("MyModule", myParam1, myParam2, myParam3)
Finally I can call all the functions inside the new Instance:
myInstance.aFunction()
The only specificity here is to custo...
How to iterate object in JavaScript? [duplicate]
...in the array.
var data = dictionary.data;
for (var i in data)
{
var id = data[i].id;
var name = data[i].name;
}
You can follow similar approach to iterate the image array.
share
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imp...
How do I make JavaScript beep?
...th="0" height="0" id="sound1"
enablejavascript="true">
You would then call it from JavaScript code as such:
PlaySound("sound1");
This should do exactly what you want - you'll just need to find/create the beep sound yourself, which should be trivial.
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