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@ variables in Ruby on Rails

...silent dup of variable, or making it 'const' so that it can't be modified, etc)? I'm coming from a C/C++ & Java perspective, and the really vague and optional syntax is driving me nuts! – Dan Devine Jun 13 '18 at 18:05 ...
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Remove all classes that begin with a certain string

...sh character ('-') and dots and others, so class names like "bg.a", "bg-a" etc. will not be removed but replaced with ".a", "-a" etc. So if you have classnames with punctuation characters you may run into trouble by just running a simple regex replace. Here is a SO thread about word boundary definit...
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lexers vs parsers

...d/matched parentheses (()()(()())), nested HTML/BBcode tags, nested blocks etc. It's because state automata to deal with it should have to have infinitely many states to handle infinitely many nesting levels. Level 2: Context-free grammars They can have nested, recursive, self-similar branches in t...
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What is the difference between 'E', 'T', and '?' for Java generics?

...ollow the same name constraints as class names, field names, method names, etc. E.g. Foo<hello_world> is valid. Using a single upper-case letter is a naming standard, which is recommended in the Java Language Specification: "Type variable names should be pithy (single character if possible) ye...
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What should go into an .h file?

...ared symbols, like functions, or definition of structures, classes, enums, etc., could need to be shared. Headers are used to put those shared details. Move to the header the declarations of what need to be shared between multiple sources Nothing more? In C++, there are some other things that co...
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What is the difference between a stored procedure and a view?

...g block in a larger query Can contain several statements, loops, IF ELSE, etc. Can perform modifications to one or several tables Can NOT be used as the target of an INSERT, UPDATE or DELETE statement. A View: Does NOT accept parameters Can be used as building block in a larger query Can...
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Why extend the Android Application class?

...id tools for global state management instead of static vars/singletons and etc. – Oleksandr Karaberov Nov 12 '15 at 12:06 ...
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How to split text without spaces into list of words?

...reenappleactiveassignmentweeklymetapho rapparentlytherearethumbgreenappleetcinthestringialsohavealargedictionarytoquery whetherthewordisreasonablesowhatsthefastestwayofextractionthxalot. After: there is masses of text information of peoples comments which is parsed from html but there are n...
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How can I remove all my changes in my SVN working directory?

... Remove any other change and supports removing files/folders with spaces, etc. svn status --no-ignore | grep -E '(^\?)|(^\I)' | sed -e 's/^. *//' | sed -e 's/\(.*\)/"\1"/' | xargs rm -rf Don't forget to get the latest files from SVN svn update --force ...
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How to check if element has any children in Javascript?

...t to know about child elements (as opposed to text nodes, attribute nodes, etc.) on all modern browsers (and IE8 — in fact, even IE6) you can do this: (thank you Florian!) if (element.children.length > 0) { // Or just `if (element.children.length)` // It has at least one element as a chil...