## download:从零打造微前端框架:实战“汽车资讯平台”项目
代码完成
JavaScript
实例
//LSD Radix Sort
var counter = [];
function radixSort(arr, maxDigit) {
var mod = 10;
var dev = 1;
for (var i = 0; i < maxDigit; i++, dev *= 10, mod *= 10) {
for(var j = 0; j < arr.length; j++) {
var bucket = parseInt((arr[j] % mod) / dev);
if(counter[bucket]==null) {
counter[bucket] = [];
}
counter[bucket].push(arr[j]);
}
var pos = 0;
for(var j = 0; j < counter.length; j++) {
var value = null;
if(counter[j]!=null) {
while ((value = counter[j].shift()) != null) {
arr[pos++] = value;
}
}
}
}
return arr;
}
Java
实例
/**
* 基数排序
* 思索负数的状况还能够参考: https://code.i-harness.com/zh-CN/q/e98fa9
*/
public class RadixSort implements IArraySort {
@Override
public int[] sort(int[] sourceArray) throws Exception {
// 对 arr 停止拷贝,不改动参数内容
int[] arr = Arrays.copyOf(sourceArray, sourceArray.length);
int maxDigit = getMaxDigit(arr);
return radixSort(arr, maxDigit);
}
/**
* 获取最高位数
*/
private int getMaxDigit(int[] arr) {
int maxValue = getMaxValue(arr);
return getNumLenght(maxValue);
}
private int getMaxValue(int[] arr) {
int maxValue = arr[0];
for (int value : arr) {
if (maxValue < value) {
maxValue = value;
}
}
return maxValue;
}
protected int getNumLenght(long num) {
if (num == 0) {
return 1;
}
int lenght = 0;
for (long temp = num; temp != 0; temp /= 10) {
lenght++;
}
return lenght;
}
private int[] radixSort(int[] arr, int maxDigit) {
int mod = 10;
int dev = 1;
for (int i = 0; i < maxDigit; i++, dev *= 10, mod *= 10) {
// 思索负数的状况,这里扩展一倍队列数,其中 [0-9]对应负数,[10-19]对应正数 (bucket + 10)
int[][] counter = new int[mod * 2][0];
for (int j = 0; j < arr.length; j++) {
int bucket = ((arr[j] % mod) / dev) + mod;
counter[bucket] = arrayAppend(counter[bucket], arr[j]);
}
int pos = 0;
for (int[] bucket : counter) {
for (int value : bucket) {
arr[pos++] = value;
}
}
}
return arr;
}
/**
* 自动扩容,并保管数据
*
* @param arr
* @param value
*/
private int[] arrayAppend(int[] arr, int value) {
arr = Arrays.copyOf(arr, arr.length + 1);
arr[arr.length - 1] = value;
return arr;
}
}
PHP
实例
function radixSort($arr, $maxDigit = null)
{
if ($maxDigit === null) {
$maxDigit = max($arr);
}
$counter = [];
for ($i = 0; $i < $maxDigit; $i++) {
for ($j = 0; $j < count($arr); $j++) {
preg_match_all('/\d/', (string) $arr[$j], $matches);
$numArr = $matches[0];
$lenTmp = count($numArr);
$bucket = array_key_exists($lenTmp - $i - 1, $numArr)
? intval($numArr[$lenTmp - $i - 1])
: 0;
if (!array_key_exists($bucket, $counter)) {
$counter[$bucket] = [];
}
$counter[$bucket][] = $arr[$j];
}
$pos = 0;
for ($j = 0; $j < count($counter); $j++) {
$value = null;
if ($counter[$j] !== null) {
while (($value = array_shift($counter[$j])) !== null) {
$arr[$pos++] = $value;
}
}
}
}
return $arr;
}
C++
实例
int maxbit(int data[], int n) //辅助函数,求数据的最大位数
{
int maxData = data[0]; ///< 最大数
/// 先求出最大数,再求其位数,这样有原先依次每个数判别其位数,略微优化点。
for (int i = 1; i < n; ++i)
{
if (maxData < data[i])
maxData = data[i];
}
int d = 1;
int p = 10;
while (maxData >= p)
{
//p *= 10; // Maybe overflow
maxData /= 10;
++d;
}
return d;
/* int d = 1; //保管最大的位数
int p = 10;
for(int i = 0; i < n; ++i)
{
while(data[i] >= p)
{
p *= 10;
++d;
}
}
return d;*/
}
void radixsort(int data[], int n) //基数排序
{
int d = maxbit(data, n);
int *tmp = new int[n];
int *count = new int[10]; //计数器
int i, j, k;
int radix = 1;
for(i = 1; i <= d; i++) //停止d次排序
{
for(j = 0; j < 10; j++)
count[j] = 0; //每次分配前清空计数器
for(j = 0; j < n; j++)
{
k = (data[j] / radix) % 10; //统计每个桶中的记载数
count[k]++;
}
for(j = 1; j < 10; j++)
count[j] = count[j - 1] + count[j]; //将tmp中的位置依次分配给每个桶
for(j = n - 1; j >= 0; j--) //将一切桶中记载依次搜集到tmp中
{
k = (data[j] / radix) % 10;
tmp[count[k] - 1] = data[j];
count[k]--;
}
for(j = 0; j < n; j++) //将暂时数组的内容复制到data中
data[j] = tmp[j];
radix = radix * 10;
}
delete []tmp;
delete []count;
}