Skip to content

Instantly share code, notes, and snippets.

@Turskyi
Created April 17, 2022 21:26
Show Gist options
  • Save Turskyi/cf6d2dd6acb5daa4bacec4703f61312c to your computer and use it in GitHub Desktop.
Save Turskyi/cf6d2dd6acb5daa4bacec4703f61312c to your computer and use it in GitHub Desktop.
Return the length of the new array.
/*
Given an integer array nums and an integer val, remove all occurrences of val in nums in-place.
The relative order of the elements may be changed.
Since it is impossible to change the length of the array in some languages,
you must instead have the result be placed in the first part of the array nums.
More formally, if there are k elements after removing the duplicates,
then the first k elements of nums should hold the final result.
It does not matter what you leave beyond the first k elements.
Return k after placing the final result in the first k slots of nums.
Do not allocate extra space for another array.
You must do this by modifying the input array in-place with O(1) extra memory.
Input: nums = [3,2,2,3], val = 3
Output: 2, nums = [2,2,_,_]
Explanation: Your function should return k = 2, with the first two elements of nums being 2.
It does not matter what you leave beyond the returned k (hence they are underscores).
* */
fun removeElement(nums: IntArray, `val`: Int): Int {
var k = 0
for (i: Int in nums.indices) {
if (nums[i] != `val`) {
nums[k] = nums[i]
k++
}
}
return k
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment