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大发888直播你可要看清楚了

2016-03-10 来源: 作者:陈延鹏 责任编辑:田艳敏

摘 要:大发888直播你可要看清楚了 y7ic82

 大发888直播你可要看清楚了

cluster.routing.allocation.disk.include_relocations:当计算节点的磁盘使用时需要考虑当前被分片的情况 主要算法思想:按以下公式计算新的RGB值:int R = 0.393*r + 0.769*g + 0.189*b; int G = 0.349*r + 0.686*g + 0.168*b; int B = 0.272*r + 0.534*g + 0.131*b;RGB的值要约束在0与255之间 大发888正确网址有什么好的

网页DOM Tree创建完成之后,WebKit会根据它的内容创建一个Render Object Tree

局部关联细节 大发888 最新地址当然品质高的除外

通过 SELECT语句,你能对每一个字段进行操作,通过复杂的表达式生成所需要的大发888直播你可要看清楚了 www.大发888.com会露出什么样的表情

大发888直播你可要看清楚了

完成中断处理后再回到先前被打断的地方继续执行

下面是boost库里面的智能指针:二、unique_ptr<T>(原来scoped_ptr<T>)1、示例#include <iostream>#include <memory>using namespace std;class X{public: X() { cout << "X ..." << endl; } ~X() { cout << "~X ..." << endl; }};int main(void){ cout << "Entering main ..." << endl; { unique_ptr<X> pp(new X); //boost::unique_ptr<X> p2(pp); //Error:所有权大发888直播你可要看清楚了 能转移 } cout << "Exiting main ..." << endl; return 0;}运行结果:2、源码分析来稍微看一下scoped_ptr的简单定义:namespace boost{ template<typename T> class scoped_ptr : noncopyable { private: T *px; scoped_ptr(scoped_ptr const &); scoped_ptr &operator=(scoped_ptr const &); typedef scoped_ptr<T> this_type; void operator==( scoped_ptr const & ) const; void operator!=( scoped_ptr const & ) const; public: explicit scoped_ptr(T *p = 0); ~scoped_ptr(); explicit scoped_ptr( std::auto_ptr<T> p ): px( p.release() ); void reset(T *p = 0); T &operator*() const; T *operator->() const; T *get() const; void swap(scoped_ptr &b); }; template<typename T> void swap(scoped_ptr<T> &a, scoped_ptr<T> &b);}与《40_面向对象编程--虚函数与多态(六)》的auto_ptr类似,内部也有一个T* px; 成员 ,智能指针对象pp 生存期到了,调用析构函数,在析构函数内会delete px;当调用reset() 函数时也能够释放堆对象,如何实现的呢?void reset(T *p = 0) // never throws{ BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors this_type(p).swap(*this);}void swap(scoped_ptr &b) // never throws{ T *tmp = b.px; b.px = px; px = tmp;}typedef scoped_ptr<T> this_type; 当调用pp.reset(),reset 函数构造一个临时对象,它的成员px=0, 在swap 函数中调换 pp.px 与(this_type)(p).px, 即现在pp.px = 0; //解绑临时对象接管了裸指针(即所有权可以交换),reset 函数返回,栈上的临时对象析构,调用析构函数,进而delete px;另外拷贝构造函数和operator= 都声明为私有,故所有权大发888直播你可要看清楚了 能转移,且因为容器的push_back 函数需要调用拷贝构造函数,故也大发888直播你可要看清楚了 能将scoped_ptr 放进vector,这点与auto_ptr 相同(大发888直播你可要看清楚了 能共享所有权) 金冠娱乐城要学凝元术

Xml代码: <Contextpath="/Pet"docBase="F:/PetWeb" debug="0"privileged="true"reloadable="false"> </Context>访问地址如下:http://localhost:8080/Pet/注:Web应用以.war文件的形式部署可以将JSP程序打包成一个war包放在目录下,服务器会自动解开这个war包,并在这个目录下生成一个同名的文件夹

代码共分为四部分:<strong><span style="font-size:18px;">/*** * @author YangXin * @info 封装共现关系列 */package unitSix;import java.io.IOException;import org.apache.hadoop.io.IntWritable;import org.apache.hadoop.mapreduce.Mapper;import org.apache.mahout.cf.taste.hadoop.item.VectorOrPrefWritable;import org.apache.mahout.math.VectorWritable;public class CooccurrenceColumnWrapperMapper extends Mapper<IntWritable, VectorWritable, IntWritable, VectorOrPrefWritable>{public void map(IntWritable key, VectorWritable value, Context context) throws IOException, InterruptedException{context.write(key, new VectorOrPrefWritable(value.get()));}}</span></strong><strong><span style="font-size:18px;">/*** * @author YangXin * @info 分割用户数量 */package unitSix;import java.io.IOException;import java.util.Iterator;import org.apache.hadoop.io.IntWritable;import org.apache.hadoop.mapreduce.Mapper;import org.apache.mahout.cf.taste.hadoop.item.VectorOrPrefWritable;import org.apache.mahout.math.VarLongWritable;import org.apache.mahout.math.Vector;import org.apache.mahout.math.VectorWritable;public class UserVectorSplitterMapper extends Mapper<VarLongWritable, VectorWritable, IntWritable, VectorOrPrefWritable>{public void map(VarLongWritable key, VectorWritable value, Context context) throws IOException, InterruptedException{long userID = key.get();Vector userVector = value.get();Iterator<Vector.Element> it = userVector.nonZeroes().iterator();IntWritable itemIndexWritable = new IntWritable();while(it.hasNext()){Vector.Element e = it.next();int itemIndex = e.index();float preferenceValue = (float)e.get();itemIndexWritable.set(itemIndex);context.write(itemIndexWritable, new VectorOrPrefWritable(userID, preferenceValue));}}}</span></strong><strong><span style="font-size:18px;">/*** * @author YangXin * @info 计算部分推荐向量 */package unitSix;import java.io.IOException;import java.util.List;import org.apache.hadoop.io.IntWritable;import org.apache.hadoop.mapreduce.Mapper;import org.apache.mahout.cf.taste.hadoop.item.VectorAndPrefsWritable;import org.apache.mahout.math.VarLongWritable;import org.apache.mahout.math.Vector;import org.apache.mahout.math.VectorWritable;public class PartialMultiplyMapper extends Mapper<IntWritable, VectorAndPrefsWritable, VarLongWritable, VectorWritable>{public void map(IntWritable key, VectorAndPrefsWritable vectorAndPrefsWritable, Context context) throws IOException, InterruptedException{Vector cooccurrenceColumn = vectorAndPrefsWritable.getVector();List<Long> userIDs = vectorAndPrefsWritable.getUserIDs();List<Float> prefValues = vectorAndPrefsWritable.getValues();for(int i = 0; i < userIDs.size(); i++){long userID = userIDs.get(i);float prefValue = prefValues.get(i);Vector partialProduct = cooccurrenceColumn.times(prefValue);context.write(new VarLongWritable(userID), new VectorWritable(partialProduct));;}}}</span></strong><strong><span style="font-size:18px;">/*** * @author YangXin * @info 实现部分成绩的combiner */package unitSix;import java.io.IOException;import org.apache.hadoop.mapreduce.Reducer;import org.apache.mahout.math.VarLongWritable;import org.apache.mahout.math.Vector;import org.apache.mahout.math.VectorWritable;public class AggregateCombiner extends Reducer<VarLongWritable, VectorWritable, VarLongWritable, VectorWritable>{public void reduce(VarLongWritable key, Iterable<VectorWritable> values, Context context) throws IOException, InterruptedException{Vector partial = null;for(VectorWritable vectorWritable : values){partial = partial == null ? vectorWritable.get() : partial.plus(vectorWritable.get());}context.write(key, new VectorWritable(partial));}}</span></strong> 大发888足球开户立即游遍了全身

p>cluster.routing.allocation.disk.include_relocations:当计算节点的磁盘使用时需要考虑当前被分片的情况 为此,Windows操作系统提供了VSS(Volume Shadow Copy)机制 大发888最新备用网站就连睡觉也在修炼

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原标题:大发888直播你可要看清楚了
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