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Is there a way to detect if a browser window is not currently active?

I have JavaScript that is doing activity periodically. When the user is not looking at the site (i.e., the window or tab does not have focus), it'd be nice to not run. ...
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Java: Detect duplicates in ArrayList?

How could I go about detecting (returning true/false) whether an ArrayList contains <em>mem>ore than one of the sa<em>mem>e ele<em>mem>ent in Java? ...
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How to use Git and Dropbox together effectively?

... I think that Git on Dropbox is great. I use it all the ti<em>mem>e. I have <em>mem>ultiple co<em>mem>puters (two at ho<em>mem>e and one at work) on which I use Dropbox as a central bare repository. Since I don’t want to host it on a public service, and I don’t have access to a server that I can always SSH...
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Finding the <em>mem>ax value of an attribute in an array of objects

I'<em>mem> looking for a really quick, clean and efficient way to get the <em>mem>ax "y" value in the following JSON slice: 13 Answers ...
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ProcessBuilder: Forwarding stdout and stderr of started processes without blocking the <em>mem>ain thread

I'<em>mem> building a process in Java using ProcessBuilder as follows: 10 Answers 10 ...
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What does the caret (^) character <em>mem>ean?

I saw an answer to a question here that helps restore a deleted file in git. 8 Answers ...
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2015年硅谷最火的高科技创业公司都有哪些 - 资讯 - 清泛网 - 专注C/C++及内核技术

...术按照技术成熟度和期望值分类,这是硅谷创业孵化器YCo<em>mem>binator 课程How to start a startup(How to Start a Startup) 提到。创新萌芽Innovation Trigger“、”期望最顶点Peak ofInflated Expectation“、”下调预期至低点Trough of Disillusion“、”回归理想S...
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Fastest Way to Serve a File Using PHP

I'<em>mem> trying to put together a function that receives a file path, identifies what it is, sets the appropriate headers, and serves it just like Apache would. ...
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How can I delete a newline if it is the last character in a file?

I have so<em>mem>e files that I'd like to delete the last newline if it is the last character in a file. od -c shows <em>mem>e that the co<em>mem><em>mem>and I run does write the file with a trailing new line: ...
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Change the Target Fra<em>mem>ework for all <em>mem>y projects in a Visual Studio Solution

I need to change the target fra<em>mem>ework for all projects. I have <em>mem>any solutions with hundreds of projects. 10 Answers ...