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How does MySQL process ORDER BY and LIMIT in a query?
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It will order first, then get the first 20. A database will also process anything in the WHERE clause before ORDER BY.
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WPF - How to force a Command to re-evaluate 'CanExecute' via its CommandBindings
I have a Menu where each MenuItem in the hierarchy has its Command property set to a RoutedCommand I've defined. The associated CommandBinding provides a callback for the evaluation of CanExecute which controls the enabled state of each MenuItem .
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Do we need type=“text/css” for in HTML5 [duplicate]
...ibute is purely advisory and explains in detail how browsers should act if it's omitted (too much to quote here). It doesn't explicitly say that an omitted type attribute is either valid or invalid, but you can safely omit it knowing that browsers will still react as you expect.
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Xcode 4.4 error - Timed out waiting for app to launch
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I had a similar issue when trying to debug an App with Ad-Hoc provisioning...
Check which provisioning you're using, it seems ad-hoc provisioning cannot be used for debugging.
EDIT In fact, it seems only development provisioning profiles are Ok for debugging
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How to detect online/offline event cross-browser?
...ost, others don't.
From the spec:
Returns false if the user agent is
definitely offline (disconnected from
the network). Returns true if the user
agent might be online.
The events online and offline are
fired when the value of this attribute
changes.
The navigator.onLine attribute must
return false...
What is the best way to get all the divisors of a number?
...gt;= nfactors:
return
The overall efficiency of this algorithm will depend entirely on the efficiency of the factorGenerator.
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Why Collections.sort uses merge sort instead of quicksort?
We know that quick sort is the fastest sorting algorithm.
1 Answer
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Write a program to find 100 largest numbers out of an array of 1 billion numbers
I recently attended an interview where I was asked "write a program to find 100 largest numbers out of an array of 1 billion numbers."
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Node.js Mongoose.js string to ObjectId function
...ing mongoose? The schema specifies that something is an ObjectId, but when it is saved from a string, mongo tells me it is still just a string. The _id of the object, for instance, is displayed as objectId("blah") .
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Disable all table constraints in Oracle
How can I disable all table constrains in Oracle with a single command?
This can be either for a single table, a list of tables, or for all tables.
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