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Converting from longitude\latitude to Cartesian coordinates
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Theory for convert GPS（WGS84) to Cartesian coordinates
https://en.wikipedia.org/wiki/Geographic_coordinate_conversion#From_geodetic_to_ECEF_coordinates
The following is what I am using:
Longitude in GPS（WGS84） and Cartesian coordinates are the same.
Latitude need be conv...
Error: Can't set headers after they are sent to the client
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The res object in Express is a subclass of Node.js's http.ServerResponse (read the http.js source). You are allowed to call res.setHeader(name, value) as often as you want until you call res.writeHead(statusCode). After writeHead, the headers ar...
What's the difference between HEAD^ and HEAD~ in Git?
When I specify an ancestor commit object in Git, I'm confused between HEAD^ and HEAD~ .
15 Answers
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Why does Java's hashCode() in String use 31 as a multiplier?
Per the Java documentation, the hash code for a String object is computed as:
13 Answers
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How to get the function name from within that function?
...ld output the name of the calling constructor (eg "Foo").
More info here: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/Caller
They claim it's non-standard, but also that it's supported by all major browsers: Firefox, Safari, Chrome, Opera and IE.
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List of ANSI color escape sequences
...ctlseqs/ctlseqs.html
http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/c327.html
https://wiki.archlinux.org/index.php/Color_Bash_Prompt
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Any good ORM tools for Android development? [closed]
...ng to http://ormlite.com/changelog.txt the last version is 4.48 from 2013,
https://github.com/j256/ormlite-core (release tags), last activity March 2015
http://greendao-orm.com, good maintenance, Maven artifact, focus: fast performance, small size, little RAM consumption. Github: https://github.com/...
vs vs for inline and block code snippets
... some inline code ("when using the foo() function...") and some block snippets. These tend to be XML, and have very long lines which I prefer the browser to wrap (i.e., I don't want to use <pre> ). I'd also like to put CSS formatting on the block snippets.
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How to split a string in Haskell?
Is there a standard way to split a string in Haskell?
13 Answers
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How to display all methods of an object?
...}
//example: getMethods(new Date()): [ 'getFullYear', 'setMonth', ... ]
https://jsfiddle.net/3xrsead0/
This won't work for something like the original question (Math), so pick your solution based on your needs. I'm posting this here because Google sent me to this question but I was wanting to kn...