/**
* @return string 获取文本内容
*/
public function getTextContent()
{
$self = $this;
return Lazy::init($this->_textContent, function () use($self) {
return file_get_contents($self->path);
});
}
public function getTitle()
{
return Lazy::init($this->_title, function () {
$textContent = $this->getTextContent();
foreach (explode("\n", $textContent) as $line) {
$line = trim($line);
if ($line[0] != '#') {
return ltrim($line, '*');
}
}
return $this->name;
});
}
});
break;
case "itersum":
test(function () use($add1, $sum, $dummyFunc) {
$result = 0;
$tmp = null;
for ($i = 0; $i <= ITER_MAX; $i++) {
// $result += $i + 1;
$result += $add1($i);
$tmp = $dummyFunc($tmp);
}
echo "iter result: " . $result . PHP_EOL;
});
break;
case "lazyfile":
test(function () use($existSql) {
Lazy::fromFile("db.log")->filter($existSql)->toFile("db_filter.log");
});
break;
case "memfile":
test(function () use($existSql) {
$buffer = [];
foreach (file("db.log") as $v) {
if ($existSql) {
$buffer[] = $v;
}
}
file_put_contents("db_filter.log", implode($buffer));
});
break;
}
public function __construct()
{
parent::__construct();
$this->addClasses($this->_loaders, __NAMESPACE__);
}
/**
* @return Config
*/
public static function instance()
{
return Lazy::init(self::$_instance, function () {
return new Config();
});
}
/**
* @return User|null 当前登录的用户;若未登录，则为空
*/
public static function getCurrentLoginUser()
{
/**@var $webUser CWebUser */
$webUser = Yii::app()->user;
if ($webUser->isGuest) {
return null;
}
return Lazy::init(self::$_loginUser, function () use($webUser) {
return User::model()->findByPk($webUser->id);
});
}
/**
* @return array 所有支持的文件类型
*/
public static function getAvailableFileTypes()
{
return Lazy::init(self::$_supportedPageFileTypes, function () {
return explode('|', WIKI_AVAILABLE_FILE_TYPES);
});
}
})->filter(function ($v) {
return $v & 1;
});
echo Lazy::fromArray($input)->map(function ($v) {
return $v + 1;
})->filter(function ($v) {
return $v & 1;
})->reduce(function ($carry, $v) {
return $carry + $v;
}) . PHP_EOL;
echo Lazy::fromArray($input)->map(function ($v) {
return $v + 1;
})->filter(function ($k) {
return $k === "x0";
}, ARRAY_FILTER_USE_KEY);
echo Lazy::fromArray($input)->map(function ($v) {
return $v + 1;
})->filter(function ($v, $k) {
return $k === "x0" && $v === 1;
}, ARRAY_FILTER_USE_BOTH);
//*/
/*
Lazy::fromFile("db.log")->filter(function($v) {
return (strpos($v, "SQL") !== false);
})->toFile("db_filter.log");
//*/
/*
$ten = Lazy::fromRange(0, 9)->getIterator();
$addOne = function($v, $x1, $x2) { return $v + $x1 + $x2;};
// 迭代器的使用错误：
// 同一个迭代器传入，foreach速递 *= 迭代器个数
<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2015/12/22
* Time: 18:32
*/
class Lazy
{
protected $_loaded = false;
protected $_name;
public function materialize()
{
$this->_loaded = true;
$this->_name = 'Kevin';
}
public function getName()
{
if (!$this->_loaded) {
throw new LogicException('Call materialize() before accessing');
}
return $this->_name;
}
}
$lazy = new Lazy();
echo $lazy->getName();
