After an item has been scraped by a spider,it is sent to the Item Pipeline which process it through several components that are executed sequentially....
分类:
其他好文 时间:
2014-07-14 00:20:06
阅读次数:
323
前言介绍:当应用程序运行的时候,会有一个连接池的管理控件运行在应用程序的进程里,统一管理应用程序和SQLSERVER建立的所有连接,并且维护这些连接一直处于活动状态。当有用户发出一个connection open指令时连接池会在自己维护的连接池中找一个处于空闲状态的连接放回自己管理的连接池里,给这个...
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数据库 时间:
2014-07-13 22:18:44
阅读次数:
332
蓝牙的radio工作在2.4GHz的ISM Band(2400-2483.5 MHz),信道间隔1MHz 采用跳频技术 在连接(CONNECTION)状态, synchronization train和synchronization scan子状态每秒至少1600次 在inquiry和page子状态...
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其他好文 时间:
2014-07-13 21:51:37
阅读次数:
446
近期工作中,发现了一个bug,是和ListView Adapter有关的。产生了FC,描写叙述信息大约是"The content of the adapter has changed but ListView did not receive a notification. Make sure the...
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其他好文 时间:
2014-07-13 17:51:11
阅读次数:
273
Given two sorted integer arrays A and B, merge B into A as one sorted array.
Note:
You may assume that A has enough space (size that is greater or equal to m + n) to hold additional elements from ...
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其他好文 时间:
2014-07-13 17:21:40
阅读次数:
208
1、错误描述
2014-7-12 21:06:37 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000422: Disabling contextual LOB creation as connection was null
2014-7-12 21:06:37 or...
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编程语言 时间:
2014-07-13 17:04:04
阅读次数:
487
Given a linked list, determine if it has a cycle in it.
Follow up:
Can you solve it without using extra space?
/**
* Definition for singly-linked list.
* class ListNode {
* int val;
* ...
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其他好文 时间:
2014-07-13 16:32:04
阅读次数:
152
淘宝商城
model
/**
* 功能:这是一个数据库连接,一个model类
*/
package com.xf.model;
import java.sql.*;
public class ConnDB
{
private Connection ct=null;
public Connection getConn()
{
try
{
Class.forNa...
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其他好文 时间:
2014-07-13 16:17:33
阅读次数:
208
/*
A - 广搜 基础
Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u
Submit
Status
Description
Farmer John has been informed of the location of a fugitive cow and wants to catch...
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其他好文 时间:
2014-07-13 16:14:50
阅读次数:
236
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
For example:
Given the below binary tree and sum
...
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其他好文 时间:
2014-07-13 13:58:01
阅读次数:
184