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What are the Ruby Gotchas a newbie should be warned about? [closed]

I have recently learned the Ruby programming language, and all in all it is a good language. But I was quite surprised to see that it was not as simple as I had expected. More precisely, the "rule of least-surprise" did not seem very respected to me (of course this is quite subjective). For examp...
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How to get MD5 sum of a string using python?

In the Flickr API docs , you need to find the MD5 sum of a string to generate the [api_sig] value. 6 Answers ...
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Easiest way to toggle 2 classes in jQuery

If I have class .A and class .B and want to switch in between on button click, what's a nice solution for that in jQuery? I still don't understand how toggleClass() works. ...
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How do I put two increment statements in a C++ 'for' loop?

I would like to increment two variables in a for -loop condition instead of one. 8 Answers ...
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Side-by-side plots with ggplot2

I would like to place two plots side by side using the ggplot2 package , i.e. do the equivalent of par(mfrow=c(1,2)) . 13...
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HTML5 Canvas 100% Width Height of Viewport?

I am trying to create a canvas element that takes up 100% of the width and height of the viewport. 7 Answers ...
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How do I change read/write mode for a file using Emacs?

If a file is set to read only mode, how do I change it to write mode and vice versa from within Emacs? 9 Answers ...
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How to do ssh with a timeout in a script?

I'm executing a script connecting via password-less SSH on a remote host. I want to set a timeout, so that if the remote host is taking an infinite time to run, I want to come out of that ssh session and continue other lines in my sh script. ...
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Legality of COW std::string implementation in C++11

It had been my understanding that copy-on-write is not a viable way to implement a conforming std::string in C++11, but when it came up in discussion recently I found myself unable to directly support that statement. ...
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Simple tool to 'accept theirs' or 'accept mine' on a whole file using git

I don't want a visual merge tool, and I also don't want to have to vi the conflicted file and manually choose the between HEAD (mine) and the imported change (theirs). Most of the time I either want all of their changes or all of mine. Commonly this is because my change made it upsteam and is comi...