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Using Enum values as String literals

...of enums: public final class Modes { public static final String MODE_1 = "Fancy Mode 1"; public static final String MODE_2 = "Fancy Mode 2"; public static final String MODE_3 = "Fancy Mode 3"; private Modes() { } } Option Four: interfaces have every field public, static and fin...
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When should I use the Visitor Design Pattern? [closed]

... build and maintain the children list.] class TreeNode( object ): def __init__( self, name, *children ): self.name= name self.children= children def visit( self, someVisitor ): someVisitor.arrivedAt( self ) someVisitor.down() for c in self.children: ...
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Accessing private member variables from prototype-defined functions

...ns they're going to be public. So we just stick to naming conventions for _private fields. Don't bother mixing Closures with Prototypes I think you shouldn't mix closure variables with prototype methods. You should use one or the other. When you use a closure to access a private variable, pro...
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What is the { get; set; } syntax in C#?

... a property with a backing field. public class Genre { private string _name; public string Name { get => _name; set => _name = value; } } share | improve this ...
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Finding the index of elements based on a condition using python list comprehension

... filtered_ranges_and_angles = [(range, angle) for range, angle in zip(ranges, angles) if should_be_kept(range)] – Mike Graham Jul 21 '16 at 21:43 ...
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hash function for string

... @Josepas the hash function should ideally return a size_t or other such unsigned value (such as the unsigned long in this code). The caller is responsible for taking modulo of the result to fit it to the hash table. The caller controls the table slot being hashed to; not the func...
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See changes to a specific file using git

... Use a command like: git diff file_2.rb See the git diff documentation for full information on the kinds of things you can get differences for. Normally, git diff by itself shows all the changes in the whole repository (not just the current directory). ...
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How should I validate an e-mail address?

...ache.commons.validator.routines.EmailValidator) (?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-...
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java.net.URLEncoder.encode(String) is deprecated, what should I use instead?

...encode( "urlParameterString", java.nio.charset.StandardCharsets.UTF_8.toString() ) ); share | improve this answer | follow | ...
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How to fetch all Git branches

...nt mess. – GoZoner Apr 25 '12 at 14:06 11 that fetch wouldn't create a new remote branch you stil...