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Difference between ObservableCollection and BindingList

I want to know the difference between ObservableCollection and BindingList because I've used both to notify for any add/delete change in Source, but I actually do not know when to prefer one over the other. ...
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What is the difference between . (dot) and $ (dollar sign)?

What is the difference between the dot (.) and the dollar sign ($) ? 13 Answers 13 ...
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Smallest data URI image possible for a transparent image

I'm using a transparent 1x1 image with a background image, to be able to use sprites and still provide alternative text for some icons. ...
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What is the purpose of python's inner classes?

Python's inner/nested classes confuse me. Is there something that can't be accomplished without them? If so, what is that thing? ...
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What does void* mean and how to use it?

Today when I was reading others' code, I saw something like void *func(void* i); , what does this void* mean here for the function name and for the variable type, respectively? ...
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Data Modeling with Kafka? Topics and Partitions

One of the first things I think about when using a new service (such as a non-RDBMS data store or a message queue) is: "How should I structure my data?". ...
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Union of dict objects in Python [duplicate]

How do you calculate the union of two dict objects in Python, where a (key, value) pair is present in the result iff key is in either dict (unless there are duplicates)? ...
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Shortcuts in Objective-C to concatenate NSStrings

Are there any shortcuts to ( stringByAppendingString: ) string concatenation in Objective-C, or shortcuts for working with NSString in general? ...
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What are best practices for validating email addresses on iOS 2.0

What is the cleanest way to validate an email address that a user enters on iOS 2.0? 13 Answers ...
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Scala vs. Groovy vs. Clojure [closed]

Can someone please explain the major differences between Scala, Groovy and Clojure. I know each of these compiles to run on the JVM but I'd like a simple comparison between them. ...