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How to use Servlets and Ajax?

...rm" action="someservlet" method="post"> <input type="text" name="foo" /> <input type="text" name="bar" /> <input type="text" name="baz" /> <input type="submit" name="submit" value="Submit" /> </form> You can progressively enhance it with ajax as bel...
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Normalization in DOM parsing with java - how does it work?

...pty Text nodes. This basically means that the following XML element <foo>hello wor ld</foo> could be represented like this in a denormalized node: Element foo Text node: "" Text node: "Hello " Text node: "wor" Text node: "ld" When normalized, the node will look l...
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Python Flask, how to set content type

...m flask import Response @app.route('/ajax_ddl') def ajax_ddl(): xml = 'foo' return Response(xml, mimetype='text/xml') The actual Content-Type is based on the mimetype parameter and the charset (defaults to UTF-8). Response (and request) objects are documented here: http://werkzeug.pocoo.o...
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in_array multiple values

...precisely equal to the targets: $haystack = array(...); $target = array('foo', 'bar'); if(count(array_intersect($haystack, $target)) == count($target)){ // all of $target is in $haystack } Note that you only need to verify the size of the resulting intersection is the same size as the array...
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Modern way to filter STL container?

...e the example from cplusplus.com for std::copy_if: std::vector<int> foo = {25,15,5,-5,-15}; std::vector<int> bar; // copy only positive numbers: std::copy_if (foo.begin(), foo.end(), std::back_inserter(bar), [](int i){return i>=0;} ); std::copy_if evaluates the lambda expression f...
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FirstOrDefault: Default value other than null

...d NullReferenceException when I'm working with collections: public class Foo { public string Bar{get; set;} } void Main() { var list = new List<Foo>(); //before C# 6.0 string barCSharp5 = list.DefaultIfEmpty(new Foo()).FirstOrDefault().Bar; //C# 6.0 or later var barCS...
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Deploy a project using Git push

...f .git happens to be in the same naming scheme as working directory. i.e. /foo/bar (working directory) and /foo/bar.git (barebone git repository). So make sure you rename /foo/bar to something else, such as /foo/bar.live or /foo/blah Well, in case you are wondering, the exact error message you woul...
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Ignore .pyc files in git repository

... "**" followed by a slash means match in all directories. For example, "**/foo" matches file or directory "foo" anywhere, the same as pattern "foo". "**/foo/bar" matches file or directory "bar" anywhere that is directly under directory "foo". ...
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ValueError: setting an array element with a sequence

...uple into a numpy #array element def foo(): return 3 numpy.array([2, foo()]) #good def foo(): return [3,4] numpy.array([2, foo()]) #Fail, can't convert a list into a numpy #array element 2. B...
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How to read data From *.CSV file using javascript?

...an example that streams a remote file): Papa.parse("http://example.com/bigfoo.csv", { download: true, step: function(row) { console.log("Row:", row.data); }, complete: function() { console.log("All done!"); } }); If your web page locks up during parsing, Papa c...