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By default, a Pandas index is a series of integers ascending from 0, similar to the indices of Python arrays. However, indices can use any NumPy data type, including floating point, timestamps, or strings. [4]: 112 Pandas' syntax for mapping index values to relevant data is the same syntax Python uses to map dictionary keys to values.
It is possible to put a value into a variable and later replace it with a new one. An assignment operation modifies the current state of the executing program. [3] Consequently, assignment is dependent on the concept of variables. In an assignment: The expression is evaluated in the current state of the program.
Therefore, compilers will attempt to transform the first form into the second; this type of optimization is known as map fusion and is the functional analog of loop fusion. [2] Map functions can be and often are defined in terms of a fold such as foldr, which means one can do a map-fold fusion: foldr f z . map g is equivalent to foldr (f .
(Reuters) -Online travel agency Booking.com could cut jobs as part of a review of its organizational structure, it said on Saturday. The company, a unit of Booking Holdings, said in an emailed ...
On upper-body days, I do chest, back, shoulders, triceps, and biceps moves like incline presses, pull-downs, chest presses, rows, biceps curls and extensions, and rear delt cable pulls.
As one of Republican nominee Donald Trump’s biggest supporters, all eyes have been on Tesla CEO Elon Musk—and it shows. Tesla shares surged more than 8% —reaching a 52-week high—in ...
In mathematics, an injective function (also known as injection, or one-to-one function [1]) is a function f that maps distinct elements of its domain to distinct elements of its codomain; that is, x 1 ≠ x 2 implies f(x 1) ≠ f(x 2) (equivalently by contraposition, f(x 1) = f(x 2) implies x 1 = x 2).
From January 2008 to December 2012, if you bought shares in companies when James S. Crown joined the board, and sold them when he left, you would have a -2.5 percent return on your investment, compared to a -2.8 percent return from the S&P 500.