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How do I determine whether my calculation of pi is accurate?

...record territory, there's nothing to compare against. Historically, the standard approach for verifying that computed digits are correct is to recompute the digits using a second algorithm. So if either computation goes bad, the digits at the end won't match. This does typically more than double t...
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How to fix the aspect ratio in ggplot?

... answered Aug 14 '11 at 15:26 AndrieAndrie 157k3636 gold badges403403 silver badges464464 bronze badges ...
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Best practices for copying files with Maven

I have config files and various documents that I want to copy from the dev environment to the dev-server directory using Maven2. Strangely, Maven does not seem strong at this task. ...
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Why does (“foo” === new String(“foo”)) evaluate to false in JavaScript?

...s boxed string object. The === operator behaves differently on primitives and objects. When comparing primitives (of the same type), === will return true if they both have the same value. When comparing objects, === will return true only if they refer to the same object (comparing by reference). ...
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Example for sync.WaitGroup correct?

...rrect? It gives the expected result, but I am unsure about the wg.Add(4) and the position of wg.Done() . Does it make sense to add the four goroutines at once with wg.Add() ? ...
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What's the difference between lists enclosed by square brackets and parentheses in Python?

... for the above 'y=x' example , list and tuple behave in the same way now (verified in python3.8.5) – Youjun Hu Aug 15 at 9:11 add a comm...
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support FragmentPagerAdapter holds reference to old fragments

... You are running into a problem because you are instantiating and keeping references to your fragments outside of PagerAdapter.getItem, and are trying to use those references independently of the ViewPager. As Seraph says, you do have guarantees that a fragment has been instantiated/add...
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When should I use the “strictfp” keyword in java?

...rict expressions must be those predicted by IEEE 754 arithmetic on operands represented using single and double formats. Within an expression that is not FP-strict, some leeway is granted for an implementation to use an extended exponent range to represent intermediate results; the n...
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Convert Rows to columns using 'Pivot' in SQL Server

I have read the stuff on MS pivot tables and I am still having problems getting this correct. 8 Answers ...
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How to ignore files which are in repository?

... @Nimbus147: it shouldn't be an issue, and any changes on that file will still be ignored (ie not added/committed). – VonC Aug 29 '11 at 16:57 ...