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Grokking the Coding Interview Patterns in Python

Solution: Remove Element

Discover how to solve the remove element problem by applying the two pointers pattern to modify arrays in place. Learn to shift elements efficiently without extra memory and return the new length of the filtered array, understanding both time and space complexity implications.

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Statement

You are given an integer array, nums, and an integer, val. Your task is to remove all occurrences of val from nums in place, meaning no additional memory allocation should be used. The relative order of the elements in the array may be changed. After modifying the array, return the number of elements that are not equal to val.

Let ...