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How can I temporarily disable a foreign key constraint in MySQL?
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To turn off foreign key constraint globally, do the following:
SET GLOBAL FOREIGN_KEY_CHECKS=0;
and remember to set it back when you are done
SET GLOBAL FOREIGN_KEY_CHECKS=1;
WARNING: You should only do this when you are doing single user mode maintenance. ...
SET NOCOUNT ON usage
...ext in a separate network packet but that's not the case. It's in fact a small structure called DONE_IN_PROC embedded in the response. It's not a separate network packet so no roundtrips are wasted.
I think you can stick to default counting behavior almost always without worrying about the performa...
LEFT OUTER joins in Rails 3
...te a warning in Rails 4 unless you also add references(:comments). Additionally, this will cause all returned comments to be eager loaded in memory due to the includes, which is possibly not what you want.
– Derek Prior
Nov 30 '13 at 1:58
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What's the difference between a continuation and a callback?
I've been browsing all over the web in search of enlightenment about continuations, and it's mind boggling how the simplest of explanations can so utterly confound a JavaScript programmer like myself. This is especially true when most articles explain continuations with code in Scheme or use monads....
Pass props to parent component in React.js
...ase of direct parent-child relationship. When parent and child have potentially a lot of intermediaries, check this answer.
Other solutions are missing the point
While they still work fine, other answers are missing something very important.
Is there not a simple way to pass a child's props to...
AngularJS multiple filter with custom filter function
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this one returns all the result if it doesn't find the searched attribute in the list, how can I do to invert this behavior and return no result if the value doesn't exist in the list?
– Zakaria Belghiti
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“Comparison method violates its general contract!”
... of the library to detect this and let you know, rather than behave erratically.
One way to satisfy the transitivity requirement in compareParents() is to traverse the getParent() chain instead of only looking at the immediate ancestor.
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What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
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Your first port of call should be the documentation which explains it reasonably clearly:
Thrown to indicate that an array has been accessed with an illegal index. The index is either negative or greater than or equal to the size of the arra...
Unable to make the session state request to the session state server
Our site is currently having this problem. Basically it only happen when we click some particular links where it will pop-up a new window.
This is the error message we receive :
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XPath - Selecting elements that equal a value
...the string value of an element as the concatenation (in document order) of all of its text-node descendents.
This explains the "strange results".
"Better" results can be obtained using the expressions below:
//*[text() = 'qwerty']
The above selects every element in the document that has at lea...