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Redis is single-threaded, then how does it do concurrent I/O?
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Well it depends on how you define concurrency.
In server-side software, concurrency and parallelism are often considered as different concepts. In a server, supporting concurrent I/Os means the server is able to serve several cli...
Representing and solving a maze given an image
... colors so that final grayscale image is approximately uniform. You can do it simply by controlling sliders in Photoshop in Image -> Adjustments -> Black & White.
Convert image to binary by setting appropriate threshold in Photoshop in Image -> Adjustments -> Threshold.
Make sure thr...
How do you perform a left outer join using linq extension methods
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For a (left outer) join of a table Bar with a table Foo on Foo.Foo_Id = Bar.Foo_Id in lambda notation:
var qry = Foo.GroupJoin(
Bar,
foo => foo.Foo_Id,
bar => bar.Foo_Id,
(x,y) => new { Foo = x, Bars = y })
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How do I clear the terminal screen in Haskell?
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edited Apr 15 '15 at 8:22
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z-index not working with fixed positioning
I have a div with default positioning (i.e. position:static ) and a div with a fixed position.
8 Answers
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What is a StoryBoard ID and how can i use this?
...ed in Xcode 4.5. I saw for every viewController that i could set some identity variables including the storyboard ID. What is this and how can i use it?
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How to inherit from a class in javascript?
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I should note that Object.create is usually much slower than using new with a function constructor.
//The prototype is just an object when you use `Object.create()`
var Base = {};
//This is how you create an instance:
var baseInstance = Object.create(Base);
//If you want to inherit from "Base"...
How do I generate a stream from a string?
I need to write a unit test for a method that takes a stream which comes from a text file. I would like to do do something like this:
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PostgreSQL database default location on Linux
...n) is called "data directory" and corresponds to what PostgreSQL calls (a little confusingly) a "database cluster", which is not related to distributed computing, it just means a group of databases and related objects managed by a PostgreSQL server.
The location of the data directory depends on th...
Array Length in Java
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It contains the allocated size, 10. The unassigned indexes will contain the default value which is 0 for int.
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