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Using a dispatch_once singleton model in Swift

...variables), and is thread safe by the definition of let. This is now officially recommended way to instantiate a singleton. Class constants were introduced in Swift 1.2. If you need to support an earlier version of Swift, use the nested struct approach below or a global constant. Nested struct cl...
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Can an html element have multiple ids?

...ec is very clear about this: If an element has multiple ID attributes, all of them must be treated as IDs for that element for the purposes of the ID selector.Such a situation could be reached using mixtures of xml:id, DOM3 Core, XML DTDs, and namespace-specific knowledge. Edit Just to clar...
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Can grep show only words that match search pattern?

... grep across a number of directories it did display the full file path for all matched files, whereas with -h it just displayed the matched words without any specification about which file it is. So, to match the original question, I think it is necessary in certain circumstances. ...
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Exception thrown in NSOrderedSet generated accessors

...t I needed to get me around this issue. Hope Apple fixes the issue eventually, but so far I haven't seen any issues with using your approach. – Christopher Hujanen Dec 2 '11 at 2:52 ...
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Get Base64 encode file-data from Input Form

...beginning stuff (up to the first ,), but that's no biggie. This would take all the fun out though. The hard way: If you want to try it the hard way (or it doesn't work), look at readAsArrayBuffer(). This will give you a Uint8Array and you can use the method specified. This is probably only useful ...
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Constructor initialization-list evaluation order

...ped aborting. This is an example of the syntax I'm using. The thing is, a_ needs to be initialized before b_ in this case. Can you guarantee the order of construction? ...
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ASP.NET MVC 3 - Partial vs Display Template vs Editor Template

...ch template gets chosen to generate the UI for the model. They are also usually used for data models (i.e. models that represent rows in a database, etc) On the other hand Partial is view-centric in that you are mostly concerned with choosing the correct partial view. The view doesn't necessarily n...
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How to return a 200 HTTP Status Code from ASP.NET MVC 3 controller

... 200 is just the normal HTTP header for a successful request. If that's all you need, just have the controller return new EmptyResult(); share | improve this answer | foll...
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How to capture UIView to UIImage without loss of quality on retina display

...IGraphicsBeginImageContext uses a fixed scale factor of 1.0, so you're actually getting exactly the same image on an iPhone 4 as on the other iPhones. I'll bet either the iPhone 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everyt...
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Using curl POST with variables defined in bash script functions

... function that generates the post data of your script. This saves you from all sort of headaches concerning shell quoting and makes it easier to read an maintain the script than feeding the post data on curl's invocation line as in your attempt: generate_post_data() { cat <<EOF { "account...