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Check for internet connection availability in Swift

Is there a way to check if the internet connection is available using Swift? 10 Answers ...
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Why would adding a method add an ambiguous call, if it wouldn't be involved in the ambiguity

... Is this a bug? Yes. Congratulations, you have found a bug in overload resolution. The bug reproduces in C# 4 and 5; it does not reproduce in the "Roslyn" version of the semantic analyzer. I've informed the C# 5 test team, and hopefully we can get this investigated and resolved befor...
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How to update the value stored in Dictionary in C#?

How to update value for a specific key in a dictionary Dictionary<string, int> ? 7 Answers ...
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Safe (bounds-checked) array lookup in Swift, through optional bindings?

If I have an array in Swift, and try to access an index that is out of bounds, there is an unsurprising runtime error: 19 A...
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How to get string objects instead of Unicode from JSON?

I'm using Python 2 to parse JSON from ASCII encoded text files. 21 Answers 21 ...
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Fully custom validation error message with Rails

Using Rails I'm trying to get an error message like "The song field can't be empty" on save. Doing the following: 17 Answer...
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Use Expect in a Bash script to provide a password to an SSH command

I'm trying to use Expect in a Bash script to provide the SSH password. Providing the password works, but I don't end up in the SSH session as I should. It goes back strait to Bash. ...
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What are the differences between git branch, fork, fetch, merge, rebase and clone?

I want to understand the difference between a branch, a fork and a clone in Git? 5 Answers ...
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Scatterplot with marginal histograms in ggplot2

Is there a way of creating scatterplots with marginal histograms just like in the sample below in ggplot2 ? In Matlab it is the scatterhist() function and there exist equivalents for R as well. However, I haven't seen it for ggplot2. ...
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In Java, what does NaN mean?

I have a program that tries to shrink a double down to a desired number. The output I get is NaN . 11 Answers ...