基本上，我正在尝试为动物创建爪子，我想知道如何压缩我的代码。该代码创建了一行，向前移动了15个空格后便会移动。它已经在一个函数中。我只能使用此变量：
for (var i = 0; i < 4; i++) {
}
和此功能：
function myFunction() {
}
function drawHands () {
penUp();
moveTo(215, 280);
penColor("black");
penDown();
penWidth(3);
turnTo(0);
moveForward(15);
penUp();
moveTo(230, 280);
penDown();
moveForward(15);
penUp();
moveTo(265, 280);
penDown();
moveForward(15);
penUp();
moveTo(280, 280);
penDown();
moveForward(15);
}
drawHands();
答案 0 :(得分：1)
您具有一些类似的重复功能：在<?php
namespace App\Library\Cache\Backend;
use Phalcon\Cache\Exception;
class Redis extends \Phalcon\Cache\Backend\Redis
{
/**
* @var \Redis
*/
protected $_redis;
/**
* {@inheritdoc}
*
* @param string $keyName
* @param integer $lifetime
* @return mixed|null
*/
public function get($keyName, $lifetime = null)
{
$redis = $this->getRedis();
/**
* @var \Phalcon\Cache\FrontendInterface $frontend
*/
$frontend = $this->_frontend;
$lastKey = $this->getKeyName($keyName);
$this->_lastKey = $lastKey;
$content = $redis->get($lastKey);
if ($content === false) {
return null;
}
if (is_numeric($content)) {
return $content;
}
return $frontend->afterRetrieve($content);
}
/**
* {@inheritdoc}
*
* @param string $keyName
* @param string $content
* @param int $lifetime
* @param bool $stopBuffer
* @return bool
*
* @throws Exception
*/
public function save($keyName = null, $content = null, $lifetime = null, $stopBuffer = true)
{
if ($keyName === null) {
$lastKey = $this->_lastKey;
} else {
$lastKey = $this->getKeyName($keyName);
$this->_lastKey = $lastKey;
}
if (!$lastKey) {
throw new Exception('The cache must be started first');
}
$redis = $this->getRedis();
/**
* @var \Phalcon\Cache\FrontendInterface $frontend
*/
$frontend = $this->_frontend;
if ($content === null) {
$cachedContent = $frontend->getContent();
} else {
$cachedContent = $content;
}
/**
* Prepare the content in the frontend
*/
if (!is_numeric($cachedContent)) {
$preparedContent = $frontend->beforeStore($cachedContent);
} else {
$preparedContent = $cachedContent;
}
if ($lifetime === null) {
$tmp = $this->_lastLifetime;
$ttl = $tmp ? $tmp : $frontend->getLifetime();
} else {
$ttl = $lifetime;
}
$success = $redis->set($lastKey, $preparedContent);
if (!$success) {
throw new Exception('Failed storing the data in redis');
}
if ($ttl > 0) {
$redis->setTimeout($lastKey, $ttl);
}
$isBuffering = $frontend->isBuffering();
if ($stopBuffer === true) {
$frontend->stop();
}
if ($isBuffering === true) {
echo $cachedContent;
}
$this->_started = false;
return $success;
}
/**
* {@inheritdoc}
*
* @param string $keyName
* @return bool
*/
public function delete($keyName)
{
$redis = $this->getRedis();
$lastKey = $this->getKeyName($keyName);
return (bool)$redis->delete($lastKey);
}
/**
* {@inheritdoc}
*
* @param string $prefix
* @return array
*/
public function queryKeys($prefix = null)
{
$redis = $this->getRedis();
$pattern = "{$this->_prefix}" . ($prefix ? $prefix : '') . '*';
return $redis->keys($pattern);
}
/**
* {@inheritdoc}
*
* @param string $keyName
* @param string $lifetime
* @return bool
*/
public function exists($keyName = null, $lifetime = null)
{
$redis = $this->getRedis();
if ($keyName === null) {
$lastKey = $this->_lastKey;
} else {
$lastKey = $this->getKeyName($keyName);
}
return (bool)$redis->exists($lastKey);
}
/**
* {@inheritdoc}
*
* @param string $keyName
* @param int $value
* @return int
*/
public function increment($keyName = null, $value = 1)
{
$redis = $this->getRedis();
if ($keyName === null) {
$lastKey = $this->_lastKey;
} else {
$lastKey = $this->getKeyName($keyName);
}
return $redis->incrBy($lastKey, $value);
}
/**
* {@inheritdoc}
*
* @param string $keyName
* @param int $value
* @return int
*/
public function decrement($keyName = null, $value = 1)
{
$redis = $this->getRedis();
if ($keyName === null) {
$lastKey = $this->_lastKey;
} else {
$lastKey = $this->getKeyName($keyName);
}
return $redis->decrBy($lastKey, $value);
}
/**
* {@inheritdoc}
*
* @return bool
*/
public function flush()
{
}
/**
* Get Prefix
*
* @return string
*/
public function getPrefix()
{
return $this->_prefix;
}
/**
* Get Redis Connection
*
* @return \Redis
*/
public function getRedis()
{
$redis = $this->_redis;
if (!is_object($redis)) {
$this->_connect();
$redis = $this->_redis;
}
return $redis;
}
/**
* Get Key Name
*
* @param $keyName
* @return string
*/
protected function getKeyName($keyName)
{
return $this->_prefix . $keyName;
}
}
内，您经常调用drawHands，然后依次依次penUp，moveTo和penDown。因此，您可以将所有内容放入一个函数中，然后在moveForward内调用该函数：
drawHands如果传递给const upMoveDownLength = (x, y, length) => {
penUp();
moveTo(x, y);
penDown();
moveForward(length);
};
function drawHands () {
penColor("black");
penWidth(3);
turnTo(0);
upMoveDownLength(215, 280, 15);
upMoveDownLength(230, 280, 15);
upMoveDownLength(265, 280, 15);
upMoveDownLength(280, 280, 15);
}
的参数始终为15，则moveForward不需要第三个参数，您可以硬编码upMoveDownLength而不是{{1 }}。
答案 1 :(得分：0)
以下是使用恰好 for循环和所述功能的答案
function myFunction() {
penUp();
moveTo(+arguments[1], 280);
if (+arguments[0] === 0) {
penColor("black");
}
penDown();
if (+arguments[0] === 0) {
penWidth(3);
turnTo(0);
}
moveForward(15);
}
function drawHands () {
for (var i = 0; i < 4; i++) {
myFunction(i, [215, 230, 265, 280][i])
}
}
drawHands();
如果可以在第一个“移动”之前设置penColor，penWidth和turnTo，则可以简化此操作
function myFunction() {
penUp();
moveTo(+arguments[0], 280);
penDown();
moveForward(15);
}
function drawHands () {
penColor("black");
penWidth(3);
turnTo(0);
for (var i = 0; i < 4; i++) {
myFunction([215, 230, 265, 280][i])
}
}
drawHands();
myFunction([215, 230, 265, 280][i])用内联数组中的第i个值调用myFuction ... 215、230等
现在，由于myFunction（如您所描述的那样不能具有形式参数），因此代码使用函数arguments“属性”来检索参数...一元{{1 }}将值强制为数字