Web Reference: The problem statement clearly asks us to modify the array in-place and it also says that the element beyond the new length of the array can be anything. Given an element, we need to remove all the occurrences of it from the array. In-depth solution and explanation for LeetCode 27. Remove Element in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and forum solutions. Instead, we can swap unwanted elements with elements from the end of the array. When we encounter the target value, we replace it with the last element and shrink the valid range by one.
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