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Transitions on the CSS display property

... You can concatenate two transitions or more, and visibility is what comes handy this time. div { border: 1px solid #eee; } div > ul { visibility: hidden; opacity: 0; transition: visibility 0s, opacity 0.5s linear; } div:hover > ul { visibil...
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What's the difference between `=` and `

I'm using R 2.8.1 and it is possible to use both = and <- as variable assignment operators. What's the difference between them? Which one should I use? ...
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In Java, what is the best way to determine the size of an object?

...f data, but I want to make sure that I don't read in too many rows of data and cause OutOfMemoryError s. Each row translates into an object. Is there an easy way to find out the size of that object programmatically? Is there a reference that defines how large primitive types and object reference...
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Can two applications listen to the same port?

Can two applications on the same machine bind to the same port and IP address? Taking it a step further, can one app listen to requests coming from a certain IP and the other to another remote IP? I know I can have one application that starts off two threads (or forks) to have similar behavior, but...
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Order of serialized fields using JSON.NET

... documentation for more information. Pass the JsonProperty an Order value and the serializer will take care of the rest. [JsonProperty(Order = 1)] This is very similar to the DataMember(Order = 1) of the System.Runtime.Serialization days. Here is an important note from @kevin-babcock ...
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What is the behavior difference between return-path, reply-to and from?

... delivery {C}QUIT {S}221 Service closing transmission channel Where {C} and {S} represent Client and Server commands, respectively. The recipient's mail would look like: Return-Path: coolstuff-you=yourcompany.com@mymailinglist.com From: <coolstuff@mymailinglist.com> To: <you@yourcompa...
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How does git compute file hashes?

... | shasum 8ab686eafeb1f44702738c8b0f24f2567c36da6d Source: http://alblue.bandlem.com/2011/08/git-tip-of-week-objects.html share | improve this answer | follow ...
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Why is std::map implemented as a red-black tree?

...bly the two most common self balancing tree algorithms are Red-Black trees and AVL trees. To balance the tree after an insertion/update both algorithms use the notion of rotations where the nodes of the tree are rotated to perform the re-balancing. While in both algorithms the insert/delete operat...
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Disable mouse scroll wheel zoom on embedded Google Maps

...st solution to this problem yet! We been facing this issue for a long time and this makes for a nice and pretty clean reusable fix! – Diego Paladino Aug 5 '14 at 5:47 11 ...
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Android ADB device offline, can't issue commands

I can't connect to my device anymore using ADB through the command line or in Eclipse . 58 Answers ...