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How to show loading spinner in jQuery?

In Prototype I can show a "loading..." image with this code: 24 Answers 24 ...
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How to set child process' environment variable in Makefile

... Make variables are not exported into the environment of processes make invokes... by default. However you can use make's export to force them to do so. Change: test: NODE_ENV = test to this: test: export NODE_ENV = test (assuming you have a sufficie...
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Implementing slicing in __getitem__

I am trying to implement slice functionality for a class I am making that creates a vector representation. 5 Answers ...
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How to trigger a phone call when clicking a link in a web page on mobile phone

I need to build a web page for mobile devices. There's only one thing I still haven't figured out: how can I trigger a phone call through the click of text? ...
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The type must be a reference type in order to use it as parameter 'T' in the generic type or method

I'm getting deeper into generics and now have a situation I need help with. I get a compile error on the 'Derived' class below as shown in the subject title. I see many other posts similar to this one but I'm not seeing the relationship. Can someone tell me how to resolve this? ...
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What does @: (at symbol colon) mean in a Makefile?

What does the following do in a Makefile? 2 Answers 2 ...
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How can I remove the top and right axis in matplotlib?

Instead of the default "boxed" axis style I want to have only the left and bottom axis, i.e.: 7 Answers ...
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Could I change my name and surname in all previous commits?

I would like to change my name, surname and email in my all commits, is it possible? 6 Answers ...
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Command substitution: backticks or dollar sign / paren enclosed? [duplicate]

What's the preferred way to do command substitution in bash? 3 Answers 3 ...
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Index on multiple columns in Ruby on Rails

I'm implementing functionality to track which articles a user has read. 2 Answers 2 ...