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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,

...d Visual Basic books talk about them to a certain extent, but they never really go into any real detail. 13 Answers ...
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What is a vertical tab?

..., fill in header, VT to body area, fill in lines, VT to form footer. Generally it was coded in the program as a character constant. From the keyboard, it would be CTRL-K. I don't believe anyone would have a reason to use it any more. Most forms are generated in a printer control language like po...
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How does Stack Overflow generate its SEO-friendly URLs?

...I benchmarked it). I figured I'd optimize it because this function can be called hundreds of times per page. /// <summary> /// Produces optional, URL-friendly version of a title, "like-this-one". /// hand-tuned for speed, reflects performance refactoring contributed /// by John Gietzen (user...
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How to test if a string is basically an integer in quotes using Ruby

...z/.match(string_to_check) #Is not a positive number else #Is all good ..continue end share | improve this answer | follow | ...
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Swift - Convert to absolute value

...alue.magnitude) // prints: 5 #2. Get absolute value of an Int from abs(_:) method Swift has a global numeric function called abs(_:) method. abs(_:) has the following declaration: func abs<T>(_ x: T) -> T where T : Comparable, T : SignedNumeric Returns the absolute value of the g...
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Read only the first line of a file?

...od (Python 2 docs, Python 3 docs): with open('myfile.txt') as f: first_line = f.readline() Some notes: As noted in the docs, unless it is the only line in the file, the string returned from f.readline() will contain a trailing newline. You may wish to use f.readline().strip() instead to rem...
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PHP ORMs: Doctrine vs. Propel

...eing the default ORM for symfony it is better supported (even though officially the ORMs are considered equal). Furthermore I better like the way you work with queries (DQL instead of Criteria): <?php // Propel $c = new Criteria(); $c->add(ExamplePeer::ID, 20); $items = ExamplePeer::doSelect...
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If string is empty then return some default value

... ActiveSupport adds a presence method to all objects that returns its receiver if present? (the opposite of blank?), and nil otherwise. Example: host = config[:host].presence || 'localhost' ...
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Is it possible in SASS to inherit from a class in another file?

The question pretty much says it all. 4 Answers 4 ...
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How do I create a self-signed certificate for code signing on Windows?

... -a sha256 -cy authority -sky signature -sv MyCA.pvk MyCA.cer (^ = allow batch command-line to wrap line) This creates a self-signed (-r) certificate, with an exportable private key (-pe). It's named "My CA", and should be put in the CA store for the current user. We're using the SHA-256 al...