代码挑战：迁移0元素|Javascript
【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：
var moveZeroes = function(nums) {
let index = 0;
for (let i = 0; i < nums.length; i ++) {
if(nums[i] != 0) {
nums[index ++] = nums[i];
}
}
while(index < nums.length) {
nums[index ++] = 0;
}
};
测试案例：
describe("moveZeroes()", function () {
it("test1", function () {
// 1. ARRANGE
let nums = [0, 1, 0, 3, 12];
let expected = [1, 3, 12, 0, 0];
// 2. ACT
moveZeroes(nums);
// 3. ASSERT
for (let i = 0; i < nums.length; i++) {
expect(nums[i]).to.be.equal(expected[i]);
}
});
it("test2", function () {
// 1. ARRANGE
let nums = [1, 9, 8, 4, 0, 0, 2, 7, 0, 6, 0, 9];
let expected = [1, 9, 8, 4, 2, 7, 6, 9, 0, 0, 0, 0];
// 2. ACT
moveZeroes(nums);
console.log(nums);
// 3. ASSERT
for (let i = 0; i < nums.length; i++) {
expect(nums[i]).to.be.equal(expected[i]);
}
});
分类：代码挑战
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