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Returning binary file from controller in ASP.NET Web API

...rn result; } A few things to note about the stream used: You must not call stream.Dispose(), since Web API still needs to be able to access it when it processes the controller method's result to send data back to the client. Therefore, do not use a using (var stream = …) block. Web API will di...
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What is the syntax rule for having trailing commas in tuple definitions?

... In all cases except the empty tuple the comma is the important thing. Parentheses are only required when required for other syntactic reasons: to distinguish a tuple from a set of function arguments, operator precedence, or to a...
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Implementing slicing in __getitem__

... The __getitem__() method will receive a slice object when the object is sliced. Simply look at the start, stop, and step members of the slice object in order to get the components for the slice. >>> class C(object): ......
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What does the Reflect object do in JavaScript?

...ble: ES6 spec, Reflection MDN Reflect (including details and examples to all of its methods) Original answer (for (historic) understanding and extra examples): The Reflection proposal seems to have progressed to the Draft ECMAScript 6 Specification. This document currently outlines the Reflect...
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How to open, read, and write from serial port in C?

...en), and just copy and paste the bits needed into each project. You must call cfmakeraw on a tty obtained from tcgetattr. You cannot zero-out a struct termios, configure it, and then set the tty with tcsetattr. If you use the zero-out method, then you will experience unexplained intermittent failur...
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Task not serializable: java.io.NotSerializableException when calling function outside closure only o

Getting strange behavior when calling function outside of a closure: 9 Answers 9 ...
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Learning Python from Ruby; Differences and Similarities

... [x*x for x in values if x > 15] to get a new list of the squares of all values greater than 15. In Ruby, you'd have to write the following: values.select {|v| v > 15}.map {|v| v * v} The Ruby code doesn't feel as compact. It's also not as efficient since it first converts the values a...
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subtle differences between JavaScript and Lua [closed]

...= operators are of lower precedence than >, >=, <, <=. In Lua, all comparison operators are the same precedence. Lua supports tail calls. UPDATE: JS now supports tail calls. Lua supports assignment to a list of variables. While it isn't yet standard in Javascript, Mozilla's JS engine ...
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One-liner to check whether an iterator yields at least one element?

... Similarly if you need to check if the iterator is empty, one could use all(False for _ in iterator) will check if the iterator is empty. (all returns True if the iterator is empty, otherwise it stops when it sees the first False element) – KGardevoir Apr 3 ...
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How to check if a user likes my Facebook Page or URL using Facebook's API

...xample, the act of liking a Page or checking in to a Place cannot automatically register or enter a promotion participant." - facebook.com/promotions_guidelines.php – Chris Jacob May 18 '11 at 1:25 ...