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How to map and remove nil values in Ruby
I have a map which either changes a value or sets it to nil. I then want to remove the nil entries from the list. The list doesn't need to be kept.
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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....
how to convert a string to date in mysql?
I have a string column which acts as a date and I want to select it as a date .
5 Answers
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Using emit vs calling a signal as if it's a regular function in Qt
Let's say I have this signal:
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What does Provider in JAX-RS mean?
Could anyone explain to me what a JAX-RS Provider is and what ‘@Provider’ annotation does? I have been reading documentation but I cant get it.
If there are resource classes that service the incoming requests, what do Providers do? How are they different from singleton resource classes when I ...
Why does 2 == [2] in JavaScript?
I recently discovered that 2 == [2] in JavaScript. As it turns out, this quirk has a couple of interesting consequences:
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Build.scala, % and %% symbols meaning
I'm new to Play! Framework 2.1 (java version) and have no experience with scala. I don't understand what are and what does % and %% mean in Build.scala. I googled about them but couldn't find their meaning.
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How to merge every two lines into one from the command line?
I have a text file with the following format. The first line is the "KEY" and the second line is the "VALUE".
21 Answers
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What is __declspec and when do I need to use it?
I have seen instances of __declspec in the code that I am reading. What is it? And when would I need to use this construct?
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How to inject dependencies into a self-instantiated object in Spring?
Let's say we have a class:
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