代码挑战:迁移0元素|Kotlin
【摘要】 Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.Example:Input: [0,1,0,3,12]Output: [1,3,12,0,0]Note:You must do ...
Given an array nums
, write a function to move all 0
's to the end of it while maintaining the relative order of the non-zero elements.
Example:
Input: [0,1,0,3,12] Output: [1,3,12,0,0]
Note:
You must do this in-place without making a copy of the array.
Minimize the total number of operations.
方案:
internal class Solution { fun moveZeroes(nums: IntArray) { var index = 0 for (i in nums.indices) { if (nums[i] != 0) { nums[index++] = nums[i] } } while (index < nums.size) { nums[index++] = 0 } } }
测试案例:
@Test fun test1() { val solution = Solution() val nums = intArrayOf(0, 1, 0, 3, 12) solution.moveZeroes(nums) val expected = intArrayOf(1, 3, 12, 0, 0) for (i in nums.indices) { Assert.assertEquals(nums[i], expected[i]) } } @Test fun test2() { val solution = Solution() val nums = intArrayOf(1, 9, 8, 4, 0, 0, 2, 7, 0, 6, 0, 9) solution.moveZeroes(nums) val expected = intArrayOf(1, 9, 8, 4, 2, 7, 6, 9, 0, 0, 0, 0) for (i in nums.indices) { Assert.assertEquals(nums[i], expected[i]) } }
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