我正在尝试使用Zend_Cache缓存一个数组,如下所示:
$cache = Zend_Registry::get('cache');
// $data is an array
$cache->save($data, 'externalData');
我得到了这个错误:
Message: Datas must be string or set automatic_serialization = true
即使在初始化引导文件中的Zend_Cache时将automatic_serialization设置为tu true:
protected function
int a = 2;
int b = a + a;
Class cache = Integer.class.getDeclaredClasses()[0];
Field myCache = cache.getDeclaredField("cache");
myCache.setAccessible(true);
Integer[] newCache = (Integer[]) myCache.get(cache);
newCache[132] = newCache[133];
System.out.printf("%d",b); // 5
Syst
几乎所有情况下,当我启动Codeigniter 4项目时,我都会得到以下错误:
"CodeIgniter\Cache\Exceptions\CacheException Cache unable to write to "/path/to/codeigniter-project/writable/cache/."
SYSTEMPATH/Cache/Handlers/FileHandler.php at line 61
它指向下面一行:
throw CacheException::forUnableToWrite($this->path);
解决这个问题
我在Ubuntu中乱搞postgresql包:
$ apt-cache show postgresql
$ apt-cache show postgresql-10
$ apt-cache show postgresql-contrib
当:
$ apt-cache show postgresql-contrib-10
N: Can't select versions from package 'postgresql-contrib-10' as it is purely virtual
N: No packages found
有人知道“纯虚拟”是什么意思吗?
谢谢。
在运行git status时,经常会收到多个警告:
$ git status
warning: Untracked cache is disabled on this system.
warning: Untracked cache is disabled on this system.
warning: Untracked cache is disabled on this system.
warning: Untracked cache is disabled on this system.
warning: Untracked cache is disabled on this syst
我有以下代码,那么当调用squareMem(10)时,f.apply(this,arguments)中的this指的是什么?
function square(num){
return num*num;
}
function memoize(f){
var cache = {};
return function(){
var key = JSON.stringify(Array.prototype.slice.call(arguments));
这是我在一本书里看到的一种混音。
from django.core.cache import caches
from django.views.decorators.cache import cache_page
from django.views.decorators.vary import vary_on_cookie
class CachePageVaryOnCookieMixin:
cache_name = 'default'
@classmethod
def get_timeout(cls):
if hasattr(cls,
我有一个共享主机,但功能有限。Memcache和mod_cache对我不可用。我想实现我自己的PHP缓存方法来缓存负载密集型SQL查询的结果。在SQL中使用汇总表是不可取的,因为查询需要多个参数,这些参数可以采用数千个不同的值(这是一个统计系统)。
我的想法是这样的:
function execQuery($parameter)
{
$query = "SELECT ....... " . $parameter; //query code has been generated
$rand = mt_rand(0,10);
//no need t
By default, the requests cache will only cache the results of search requests where size=0, so it will not cache hits, but it will cache hits.total, aggregations, and suggestions.
我不明白上面写着"size=0“的部分。
这里的大小上下文/意思是什么?
这是否意味着结果缓存将
缓存仅用于空结果?缓存页仅为1(我认为默认为10个结果)?