大约有 40,000 项符合查询结果(耗时:0.0443秒) [XML]

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How to avoid having class data shared among instances?

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

... Taylor series method, but it proved to converge extremely slowly (when I compared my result with the online values after some time). Anyway, I am trying better algorithms. ...
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Convert Rows to columns using 'Pivot' in SQL Server

...sing a hard-cded version initially." Unlike the Qlikview Generic function (community.qlik.com/blogs/qlikviewdesignblog/2014/03/31/generic) which allows doesn't require that you explicitly name the different "FOR ____ IN (...)" – The Red Pea Aug 13 '15 at 22:03 ...
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What is this 'Lambda' everyone keeps speaking of?

...omething useful with array[i] } by using the forEach of array objects, becomes: array.forEach(function (element, index) { // do something useful with element // element is the equivalent of array[i] from above }); The above abstraction may not be that useful, but there are other higher or...
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Difference between Inheritance and Composition

Are Composition and Inheritance the same? If I want to implement the composition pattern, how can I do that in Java? 17 Ans...
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Is it possible to make abstract classes in Python?

...you need it? If the class is already established as abstract shouldn't the compiler/interpret know that all the methods are from the abstract class in question? – Charlie Parker Mar 17 '14 at 3:30 ...
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Get nth character of a string in Swift programming language

... Why is this not built-in? The error message says "see the documentation comment for discussion". Apple provides the following explanation in the file UnavailableStringAPIs.swift: Subscripting strings with integers is not available. The concept of "the ith character in a string" has dif...
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Inheritance vs. Aggregation [closed]

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What are the Ruby Gotchas a newbie should be warned about? [closed]

...in a boolean expression. Versions prior to 1.9 lack a character data type (compare to C, which provides type char for characters). This may cause surprises when slicing strings: "abc"[0] yields 97 (an integer, representing the ASCII code of the first character in the string); to obtain "a" use "abc"...
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What do 3 dots next to a parameter type mean in Java?

...hod. See the "Arbitrary Number of Arguments" section here: http://java.sun.com/docs/books/tutorial/java/javaOO/arguments.html#varargs In your example, you could call it as any of the following: myMethod(); // Likely useless, but possible myMethod("one", "two", "three"); myMethod("solo"); myMethod(ne...