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How do I negate a test with regular expressions in a bash script?

...ate a test with Regular Expressions. For example, I would like to conditionally add a path to the PATH variable, if the path is not already there, as in: ...
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Reverse a string in Python

... @Tanner [::-1] is fastest because it does not call any external functions, rather it's using slicing, which is highly-optimized in python. ''.join(list(reversed(s))) makes 3 function calls. – hd1 Apr 27 at 13:51 ...
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Duplicate symbols for architecture x86_64 under Xcode

...at defines an Objective-C class or category. While this option will typically result in a larger executable (due to additional object code loaded into the application), it will allow the successful creation of effective Objective-C static libraries that contain categories on existing classes...
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When should I use perror(“…”) and fprintf(stderr, “…”)?

... 113 Calling perror will give you the interpreted value of errno, which is a thread-local error val...
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Node.js: Difference between req.query[] and req.params

...rentPage) { /** * Construct two different queries * - Fetch all patients * - Adjusted one to only fetch a selected slice of patients for a given page */ patientQuery /** * This means I will not retrieve all patients I find, but I will skip the first "n"...
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Get current controller in view

... Create base class for all controllers and put here name attribute: public abstract class MyBaseController : Controller { public abstract string Name { get; } } In view @{ var controller = ViewContext.Controller as MyBaseController; ...
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Why would iterating over a List be faster than indexing through it?

...nt head -> item1 -> print item1 -> item2 -> print item2 etc. all in a single traversal, which is O(N). Now, going to the other implementation of List which is ArrayList, that one is backed by a simple array. In that case both of the above traversals are equivalent, since an array is c...
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Split list into multiple lists with fixed number of elements

... answered Sep 18 '11 at 2:56 Kipton BarrosKipton Barros 19.7k33 gold badges6161 silver badges7575 bronze badges ...
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How can I convert immutable.Map to mutable.Map in Scala?

... answered Feb 19 '11 at 12:03 Kevin WrightKevin Wright 48.2k88 gold badges100100 silver badges152152 bronze badges ...
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How to convert string representation of list to a list?

... Community♦ 111 silver badge answered Dec 12 '09 at 18:30 Roger PateRoger Pate ...