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Map Tiling Algorithm

... this algorithm is to use a pre-processing step to find all edges and then select the correct smoothing tile according to the shape of the edge. The first step would be to find all edges. In the example below the edge tiles marked with an X are all green tiles with a tan tile as one or more of thei...
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How to do this using jQuery - document.getElementById(“selectlist”).value

In jQuery, what is the equivalent to document.getElementById("selectlist").value ? 6 Answers ...
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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?

...ction table Example queries: -- Getting all students for a class: SELECT s.student_id, last_name FROM student_classes sc INNER JOIN students s ON s.student_id = sc.student_id WHERE sc.class_id = X -- Getting all classes for a student: SELECT c.class_id, name FROM s...
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Google maps API V3 - multiple markers on exact same spot

...t to be written) function to popup an InfoWindow with a list of options to select from. Note that the markerClusterer object is passed to your function, because you will need this to determine how many markers there are in that cluster. For example: function multiChoice(mc) { var cluster = mc....
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How to show Page Loading div until the page has finished loading?

...eforeSend: function(xhr){ <---- use this option here $('.select_element_you_want_to_load_into').html('Loading...'); }, success: function(msg){ $('.select_element_you_want_to_load_into').html(msg); } }); EDIT I see, in that case, using one of the 'display:block'/'displ...
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How to calculate the SVG Path for an arc (of a circle)

...so far, there are actually four arcs that could be drawn, so the two flags select one of them. I'm guessing you probably want to draw a small arc (meaning large-arc-flag=0), in the direction of decreasing angle (meaning sweep-flag=0). All together, the SVG path is: M 200 175 A 25 25 0 0 0 182.322 2...
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How do I force Postgres to use a particular index?

...d, client_id, date, and description. You want to run the following query: SELECT client_id, SUM(amount) FROM transactions WHERE date >= 'yesterday'::timestamp AND date < 'today'::timestamp AND description = 'Refund' GROUP BY client_id PostgreSQL may choose to use the index transaction...
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How to loop through a HashMap in JSP?

...lt;%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <select name="country"> <c:forEach items="${countries}" var="country"> <option value="${country.key}">${country.value}</option> </c:forEach> </select> You need a Servlet or a S...
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When to use Hadoop, HBase, Hive and Pig?

... Consider that you work with RDBMS and have to select what to use - full table scans, or index access - but only one of them. If you select full table scan - use hive. If index access - HBase. s...
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How to Use slideDown (or show) function on a table row?

...uld try wrapping the contents of the row in a <span> and having your selector be $('#detailed_edit_row span'); - a bit hackish, but I just tested it and it works. I also tried the table-row suggestion above and it didn't seem to work. update: I've been playing around with this problem, and fr...