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Why is NaN not equal to NaN? [duplicate]

...ted answer, I disagree with it. NaN does not mean "undefined" - see http://www.cs.berkeley.edu/~wkahan/ieee754status/IEEE754.PDF, page 7 (search for the word "undefined"). As that document confirms, NaN is a well-defined concept. Furthermore, IEEE approach was to follow the regular mathematics rule...
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How to use Servlets and Ajax?

...equest content type to application/json instead of (default) application/x-www-form-urlencoded. This can't be done via $.post() convenience function, but needs to be done via $.ajax() as below. var data = { foo: "fooValue", bar: "barValue", baz: "bazValue" }; $.ajax({ type: "POST",...
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What is PostgreSQL explain telling me exactly?

...dented to least indented, and I believe from the bottom of the plan to the top. (So if there are two indented sections, the one farther down the page executes first, then when they meet the other executes, then the rule joining them executes.) The idea is that at each step there are 1 or 2 datasets...
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CSS display:table-row does not expand when width is set to 100%

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node.js child process - difference between spawn & fork

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Where should signal handlers live in a django project?

...assing in the dispatch_uid argument. More at docs.djangoproject.com/en/dev/topics/signals/…. – Scott Coates Apr 23 '13 at 0:25 ...
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How to declare variable and use it in the same Oracle SQL script?

...sal > l_sal 10 and deptno = l_dno; 11 dbms_output.put_line('top earners = '||to_char(n)); 12 end; 13 / Enter value for dno: 10 old 4: l_dno number := &dno; new 4: l_dno number := 10; top earners = 1 PL/SQL procedure successfully completed. SQL> ...
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Difference between len() and .__len__()?

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How do I handle the window close event in Tkinter?

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Understanding how recursive functions work

...icLippert While techniques used to implement recursivity is an interesting topic per se, I am not sure if it would be useful for the OP—who wants to understand “how it works”—to be exposed to the variety of mechanisms used. While continuation passing style or expansion based languages (e.g....