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How to do an INNER JOIN on multiple columns
...ct and I'm supposed to perform a database query which finds flights either by the city name or the airport code, but the flights table only contains the airport codes so if I want to search by city I have to join on the airports table.
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Difference between .tagName and .nodeName
...Level-3-Core/core.html#ID-104682815
btw the Node interface is implemented by every node in the DOM tree (including the document object itself). The Element interface is implemented only by those nodes in the DOM tree that represent elements in an HTML document (nodes with nodeType === 1) .
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Do you have to include ?
...irectory). The browser/webpage looks for favicon.ico in the root directory by default.
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Javascript roundoff number to nearest 0.5
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Write your own function that multiplies by 2, rounds, then divides by 2, e.g.
function roundHalf(num) {
return Math.round(num*2)/2;
}
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Can someone explain this 'double negative' trick? [duplicate]
I am by no means an expert at Javascript, but I have been reading Mark Pilgrim's "Dive into HTML5" webpage and he mentioned something that I would like a better understanding of.
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Is it safe to use -1 to set all bits to true?
... why is -1 guaranteed to be converted to all ones? Is that guaranteed by the standard?
– jalf
Apr 30 '09 at 22:11
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Caching a jquery ajax response in javascript/browser
...esentation.
Use Console view (F12) or FireBug to view some logs generated by the cache.
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Something better than .NET Reflector? [closed]
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Also take a look at ILSpy by SharpDevelop. It's in early stages of development and they just made a release on the 24th of February. That in itself works pretty good for me. From their website:
ILSpy is the open-source .NET assembly
browser and ...
How do I design a class in Python?
..., you have almost no mutable data. What you have is derived data, created by transformation functions from the source dataset.
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Rails 3 check if attribute changed
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Check out ActiveModel::Dirty (available on all models by default). The documentation is really good, but it lets you do things such as:
@user.street1_changed? # => true/false
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