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Is it possible to ping a server from Javascript?

...g a web app that requires that I check to see if remote servers are online or not. When I run it from the command line, my page load goes up to a full 60s (for 8 entries, it will scale linearly with more). ...
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Difference between setTimeout with and without quotes and parentheses

...t at W3Schools , I noticed a strange figure which I didn’t run into before. They are using double quotes and then call the function. ...
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What's the difference between unit tests and integration tests? [duplicate]

...nds on what the programmer considers to be useful. The tests are intended for the use of the programmer, they are not directly useful to anybody else, though, if they do their job, testers and users downstream should benefit from seeing fewer bugs. Part of being a unit test is the implication that...
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Installing a local module using npm?

...d module repo, I want to install it locally, not globally in another directory? 7 Answers ...
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@Scope(“prototype”) bean scope not creating new bean

...roller. But spring is creating a singleton bean instead. Here is the code for that: 12 Answers ...
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Best Practice for Exception Handling in a Windows Forms Application?

I'm currently in the process of writing my first Windows Forms application. I've read a few C# books now so I've got a relatively good understanding of what language features C# has to deal with exceptions. They're all quite theoretical however so what I haven't got yet is a feel for how to translat...
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Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La

The error in the title is thrown only in Google Chrome, according to my tests. I'm base64 encoding a big XML file so that it can be downloaded: ...
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How to build for armv6 and armv7 architectures with iOS 5

...0. With only armv7 specified in Architectures, Xcode warned me that to support anything below iOS4.2 I had to include armv6 in Architectures. Just edit that field, click the "+" button when the dialog pops up and enter the literal "armv6". In my case, we want our app to work under iOS4 and iOS5. We...
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When do we need curly braces around shell variables?

...mbiguous cases, can be considered good programming practice. This is both for consistency and to avoid surprises like $foo_$bar.jpg, where it's not visually obvious that the underscore becomes part of the variable name. shar...
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How does the Meteor JavaScript framework work? [closed]

I came across Meteor and while it seems exciting, I want to know how it works. I mean conventional web applications work like this: You have scripts on server which take data from database and add that dynamically to web-pages and the user-submitted data gets added to databases through some other ...