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recursion versus iteration
Is it correct to say that everywhere recursion is used a for loop could be used? And if recursion is usually slower what is the technical reason for ever using it over for loop iteration?
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Pure virtual destructor in C++
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class A {
public:
virtual ~A() = 0;
};
inline A::~A() { }
should suffice.
And since this got a down vote, I should clarify: If you derive anything from A and then try to delete or destroy it, A's destructor will eventually be called. Since it is pure and doesn't have an implementation, unde...
OnChange event handler for radio button (INPUT type=“radio”) doesn't work as one value
I'm looking for a generalized solution for this.
16 Answers
16
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Markdown and including multiple files
Is there any markdown fork that allows you to reference other files, something like an includes file? Specifically, I want to create a separate markdown file with links that I call often but not always (call this B.md), then when I link by reference in the md file I'm writing (A.md), I'd like it to ...
Web workers without a separate Javascript file?
As far as I can tell, web workers need to be written in a separate JavaScript file, and called like this:
25 Answers
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Parsing boolean values with argparse
...like to use argparse to parse boolean command-line arguments written as "--foo True" or "--foo False". For example:
20 Answ...
Easy way to test a URL for 404 in PHP?
I'm teaching myself some basic scraping and I've found that sometimes the URL's that I feed into my code return 404, which gums up all the rest of my code.
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How to align a div to the top of its parent but keeping its inline-block behaviour?
See: http://jsfiddle.net/b2BpB/1/
5 Answers
5
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How do you access the matched groups in a JavaScript regular expression?
I want to match a portion of a string using a regular expression and then access that parenthesized substring:
22 Answers...
When should null values of Boolean be used?
Java boolean allows values of true and false while Boolean allows true , false , and null . I have started to convert my boolean s to Boolean s. This can cause crashes in tests such as
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