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What algorithms compute directions from point A to point B on a map?

...oughly half the work (2*pi*(r/2)^2 vs pi*r^2). To avoid exploring the back-alleys of every city between your source and destination, you can have several layers of map data: A 'highways' layer that contains only highways, a 'secondary' layer that contains only secondary streets, and so forth. Then, ...
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Why does Hibernate require no argument constructor?

...objects without invoking the constructor. But this is not available across all VMs. For example, XStream can create instances of objects that don't have a public no-arg constructor, but only by running in a so-called "enhanced" mode which is available only on certain VMs. (See the link for details.)...
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Validate decimal numbers in JavaScript - IsNumeric()

...(I had to consider also exponential notation, etc.), a Number object, virtually anything could be passed to that function, I couldn't make any type assumptions, taking care of type coercion (eg. +true == 1; but true shouldn't be considered as "numeric"). I think is worth sharing this set of +30 un...
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CSS3 gradient background set on body doesn't stretch but instead repeats?

... I know I'm late to the party, but here's a more solid answer. All you need to do is use min-height: 100%; rather than height: 100%; and your gradient background will extend the entire height of the viewport without repeating, even if the content is scrollable. Like this: html { mi...
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How to allow keyboard focus of links in Firefox?

... In System Preferences → Keyboard, in the Shortcuts pane, check the “all controls” radio at the bottom. In Firefox, type "about:config" in the URL bar. There is no accessibility.tabfocus preference on the mac, so you'll have to make one. Right click in the window, create a new "integer" pref...
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How can I recursively find all files in current and subfolders based on wildcard matching?

How can I recursively find all files in current and subfolders based on wildcard matching? 16 Answers ...
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How to hide a in a menu with CSS?

I've realized that Chrome, it seems, will not allow me to hide <option> in a <select> . Firefox will. 13 Ans...
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In C#, What is a monad?

... Most of what you do in programming all day is combining some functions together to build bigger functions from them. Usually you have not only functions in your toolbox but also other things like operators, variable assignments and the like, but generally your...
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Why is an array not assignable to Iterable?

...t will do the conversion for you, explicitly. (Having said that, you can call clone on arrays.) share | improve this answer | follow | ...
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How do you pass multiple enum values in C#?

... if (isTuesdaySet) //... // Do your work here.. } public void CallMethodWithTuesdayAndThursday() { this.RunOnDays(DaysOfWeek.Tuesday | DaysOfWeek.Thursday); } For more details, see MSDN's documentation on Enumeration Types. Edit in response to additions to question. You won't b...