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How to evaluate a math expression given in string form?
...described wiki.The logic of this algoritm starting from rules of operation orders. 1. operator sign | variable evaluation | function call | parenthesis (sub-expressions); 2. exponentiation; 3. multiplication, division; 4. addition, subtraction;
– Vasile Bors
J...
Use Mockito to mock some methods but not others
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Concatenate multiple result rows of one column into one, group by another column [duplicate]
...cter, "char"), and some other types.
As isapir commented, you can add an ORDER BY clause in the aggregate call to get a sorted list - should you need that. Like:
SELECT movie, string_agg(actor, ', ' ORDER BY actor) AS actor_list
FROM tbl
GROUP BY 1;
But it's typically faster to sort rows in a...
SQL multiple column ordering
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ORDER BY column1 DESC, column2
This sorts everything by column1 (descending) first, and then by column2 (ascending, which is the default) whenever the column1 fields for two or more rows are equal.
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Should I use multiplication or division?
.... Remember that compilers generally cannot optimize floating point much in order to guarantee precision.
– rasmus
Sep 14 '12 at 7:22
7
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Numpy argsort - what is it doing?
...ermutation (that if the 2 permutations are applied to each other in either order the result is the Identity). The second permutation if applied to a sorted data array would produce the unsorted data array, i.e. it is the rank.
– Alex C
May 18 '16 at 0:35
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BeautifulSoup Grab Visible Webpage Text
...t. I can't figure out the arguments I need for the function findAll() in order to just get the visible texts on a webpage.
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What is the difference between public, protected, package-private and private in Java?
...e MyClass and I'm doing AnotherClass extends MyClass I will have access to all protected and public methods and properties from within AnotherClass. If I do MyClass myClass = new MyClass(); in AnotherClass somewhere - let's say the constructor - I will only have access to the public methods if it is...
What do
...re saying that A can be implicitly converted to String. If you changed the order and made the implicit argument be of type String =:= A, it wouldn't work, because this would be an implicit conversion from String to A.
– Tom Crockett
Aug 8 '10 at 9:34
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SQL Server 2008 can't login with newly created user
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