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If strings are immutable in .NET, then why does Substring take O(n) time?

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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess

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What is copy-on-write?

... used for... however, in some situations, this type of strategy results in more optimized results. – Andrew Flanagan Mar 10 '09 at 4:33 3 ...
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Why is 'this' a pointer and not a reference?

... often useful for an object to get a reference to itself. I'd say that's a more common usage. Anyway, the main reason is like you said, references didn't exist when they created the 'this' pointer. – jalf Mar 14 '09 at 14:42 ...
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What is the difference between a directory and a folder?

...s. ... If one is referring to a container of documents, the term folder is more appropriate. The term directory refers to the way a structured list of document files and folders is stored on the computer. The distinction can be due to the way a directory is accessed; on Unix systems, /usr/bin/ is us...
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Can you explain the concept of streams?

...etwork or anything else which supports the stream idea, your code is a lot more flexible. In addition, streams are often chained together - you can have a stream which compresses whatever is put into it, writing the compressed form on to another stream, or one which encrypts the data, etc. At the o...
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Is there a naming convention for Django apps

...here a preferred naming convention for creating a Django app consisting of more than one word? For instance, which of the following is preferred? ...
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Why does installing Nokogiri on Mac OS fail with libiconv is missing?

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Converting a Java collection into a Scala collection

...ection.immutable.Set[String] after this. Also see Ben James' answer for a more explicit way (using JavaConverters), which seems to be recommended now. share | improve this answer | ...
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What is Hindley-Milner?

...he type of keys stored in the tree. Sometimes a function or value can have more than one type, as in the example of the length function: it can be "list of integers to integer", "list of strings to integer", "list of pairs to integer", and so on. In this case, a signal advantage of the Hindley-Miln...