![]() ![]() Elements can be removed from the end of a dynamic array in constant time, as no resizing is required. Typically resizing is expensive because it involves allocating a new underlying array and copying each element from the original array. When all space is consumed, and an additional element is to be added, then the underlying fixed-size array needs to be increased in size. Elements can be added at the end of a dynamic array in constant time by using the reserved space, until this space is completely consumed. ![]() The elements of the dynamic array are stored contiguously at the start of the underlying array, and the remaining positions towards the end of the underlying array are reserved, or unused. 2 Geometric expansion and amortized costīounded-size dynamic arrays and capacity Ī simple dynamic array can be constructed by allocating an array of fixed-size, typically larger than the number of elements immediately required.1 Bounded-size dynamic arrays and capacity. ![]()
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