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Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?

I noticed that in Internet Explorer (but, unfortunately, not in the other browsers I tested), you can use some Unicode variable names. This made my day, and I was absolutely delighted that I could write fun Unicode-laden code like this: ...
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Check if object value exists within a Javascript array of objects and if not add a new object to arr

If I have the following array of objects: 18 Answers 18 ...
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Double not (!!) operator in PHP

What does the double not operator do in PHP? 6 Answers 6 ...
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Pros and cons of AppSettings vs applicationSettings (.NET app.config / Web.config)

When developing a .NET Windows Forms Application we have the choice between those App.config tags to store our configuration values. Which one is better? ...
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Linear Regression and group by in R

I want to do a linear regression in R using the lm() function. My data is an annual time series with one field for year (22 years) and another for state (50 states). I want to fit a regression for each state so that at the end I have a vector of lm responses. I can imagine doing for loop for each ...
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What is the difference between encode/decode?

I've never been sure that I understand the difference between str/unicode decode and encode. 6 Answers ...
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How do I set up DNS for an apex domain (no www) pointing to a Heroku app?

I already added a custom domain to my Heroku app and it works with www.domain.com . 4 Answers ...
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What happens with constraints when a view is removed

The question I have is simple but I couldn't find any information in the documentation. 6 Answers ...
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How can I determine if a date is between two dates in Java? [duplicate]

How can I check if a date is between two other dates, in the case where all three dates are represented by instances of java.util.Date ? ...
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iPhone: Detecting user inactivity/idle time since last screen touch

Has anybody implemented a feature where if the user has not touched the screen for a certain time period, you take a certain action? I'm trying to figure out the best way to do that. ...