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Is std::vector so much slower than plain arrays?

I've always thought it's the general wisdom that std::vector is "implemented as an array," blah blah blah. Today I went down and tested it, and it seems to be not so: ...
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Change the current directory from a Bash script

Is it possible to change current directory from a script? 15 Answers 15 ...
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jQuery: Check if div with certain class name exists

...e is a truthy value at the first ([0]) index, then assume class exists. Edit 04/10/2013: I've created a jsperf test case here. share | improve this answer | follow ...
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find vs find_by vs where

... Use whichever one you feel suits your needs best. The find method is usually used to retrieve a row by ID: Model.find(1) It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as des...
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Go Error Handling Techniques [closed]

I'm just getting started with Go. My code is starting to have a lot of this: 11 Answers ...
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Should I test private methods or only public ones? [closed]

...test private methods. I usually do not test them, because I always thought it's faster to test only public methods that will be called from outside the object. Do you test private methods? Should I always test them? ...
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How to properly compare two Integers in Java?

I know that if you compare a boxed primitive Integer with a constant such as: 10 Answers ...
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R and version control for the solo data analyst

... I feel the answer to your question is a resounding yes- the benefits of managing your files with a version control system far outweigh the costs of implementing such a system. I will try to respond in detail to some of the points you raised: Backup: I have a backup system already i...
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Is it OK to leave a channel open?

Is it OK to leave a Go channel open forever (never close the channel) if I never check for its state? Will it lead to memory leaks? Is the following code OK? ...
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Proper indentation for Python multiline strings

What is the proper indentation for Python multiline strings within a function? 14 Answers ...