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How can I check whether a radio button is selected with JavaScript?

I have two radio buttons within an HTML form. A dialog box appears when one of the fields is null. How can I check whether a radio button is selected? ...
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What is the best way to compare floats for almost-equality in Python?

It's well known that comparing floats for equality is a little fiddly due to rounding and precision issues. 15 Answers ...
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Why can I initialize a List like an array in C#?

Today I was surprised to find that in C# I can do: 6 Answers 6 ...
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How to understand nil vs. empty vs. blank in Ruby

I find myself repeatedly looking for a clear definition of the differences of nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come: ...
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How to create a date object from string in javascript [duplicate]

Having this string 30/11/2011 . I want to convert it to date object. 8 Answers 8 ...
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How can I round up the time to the nearest X minutes?

Is there a simple function for rounding UP a DateTime to the nearest 15 minutes? 13 Answers ...
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How to fix corrupted git repository?

I tried cloning my repository which I keep on my Ubuntu one folder to a new machine and I got this: 14 Answers ...
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How to get the IP address of the docker host from inside a docker container

As the title says. I need to be able to retrieve the IP address the docker hosts and the portmaps from the host to the container, and doing that inside of the container. ...
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How to capitalize the first letter in a String in Ruby

The upcase method capitalizes the entire string, but I need to capitalize only the first letter. 8 Answers ...
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Selecting only first-level elements in jquery

How can I select the link elements of only the parent <ul> from a list like this? 10 Answers ...