This is exactly analogous to declaring formal parameter Jan 12, 2009 · A List uses an internal array to handle its data, and automatically resizes the array when adding more elements to the List than its current capacity, which makes it more easy to use than an array, where you need to know the capacity beforehand. Drag the item where you want. g. For example, with a flat dictionary whose values are themselves hashable: Nov 2, 2010 · When reading, list is a reference to the original list, and list[:] shallow-copies the list. For example, The first, [:], is creating a slice (normally often used for getting just part of a list), which happens to contain the entire list, and thus is effectively a copy of the list. Since the code in test works for any kind of object in the list, this works as a formal method parameter. The notation List<?> means "a list of something (but I'm not saying what)". The Java syntax for that is to put <T> in front of the function. Jan 27, 2012 · list[a:b:c], a is the starting index, b is the ending index and c is the optional step size. , subtract a list of dicts from another list of dicts, but the list to subtract is large, what do you do? If you can decorate your values in some way that they're hashable, that solves the problem.

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