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What's the difference between a Future and a Promise?
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According to this discussion, Promise has finally been called CompletableFuture for inclusion in Java 8, and its javadoc explains:
A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent fu...
Python: Select subset from list based on index set
I have several lists having all the same number of entries (each specifying an object property):
5 Answers
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Difference between a Seq and a List in Scala
...tional programming. However, it has limitations and it's inadequate for parallel programming. These days, Vector is a better choice than List, but habit is hard to break.
Seq is a good generalization for sequences, so if you program to interfaces, you should use that. Note that there are actually t...
Rails respond_with: how does it work?
...it works (what options you can use, etc) or point me to the place it's actually implemented so I can peruse the code on my own?
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Difference between 'struct' and 'typedef struct' in C++?
...struct Foo x;
Any time you want to refer to a Foo, you'd always have to call it a struct Foo. This gets annoying fast, so you can add a typedef:
struct Foo { ... };
typedef struct Foo Foo;
Now struct Foo (in the tag namespace) and just plain Foo (in the ordinary identifier namespace) both refe...
Floating elements within a div, floats outside of div. Why?
...t, and poorly implemented piece of technology. In fact, this reasoning actually explains a lot of html/css quirks you've no doubt encountered since you made this post.
– Slight
Apr 23 '15 at 16:01
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What are Transient and Volatile Modifiers?
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Actually, the JLS permits static and transient to be used together. The problem is it makes little sense, because typical serialization mechanisms don't persist statics anyway.
– Stephen C
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What is array to pointer decay?
... decay doesn't happen.
If you're passing an array by value, what you're really doing is copying a pointer - a pointer to the array's first element is copied to the parameter (whose type should also be a pointer the array element's type). This works due to array's decaying nature; once decayed, size...
ASP.NET Web API Authentication
...rom a client application while using the ASP.NET Web API . I have watched all the videos on the site and also read this forum post .
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Why is the JVM stack-based and the Dalvik VM register-based?
...s for instructions
are largely implicit, the object
code will tend to be smaller. This
is important if you're going to be
downloading the code over a slow
network link.
Going with a register-based scheme probably means that Dalvik's code generator doesn't have to work as hard to produce performant...