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Check if a temporary table exists and delete if it exists before creating a temporary table
...the problem.
The following works fine for me in SQL Server 2005, with the extra "foo" column appearing in the second select result:
IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
GO
CREATE TABLE #Results ( Company CHAR(3), StepId TINYINT, FieldId TINYINT )
GO
select company, step...
社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ache.commons.httpclient.methods.GetMethod;
import org.apache.commons.lang.StringUtils;
public class HttpCrawler {
public static void main(String[] args) {
String content = null ;
try {
HttpClient httpClient = new HttpClient();
...
How to resolve “Waiting for Debugger” message?
I have HTC Comet connected to Eclipse with SDK 2.2. I do a debug build - the application does not run; though it does get installed on the device. On the device I get this message box on the Comet screen
...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
... out that this answer is slightly misleading. When extracting ints or std::strings or similar, the EOF bit is set when you extract the one right before the end and the extraction hits the end. You do not need to read again. The reason it doesn't get set when reading from files is because there's an ...
Do I cast the result of malloc?
...that pesky stdlib.h is the REAL important thing to remember!"
It forces an extra cognitive cross-check. It puts the (alleged) desired type right next to the arithmetic you're doing for the raw size of that variable. I bet you could do an SO study that shows that malloc() bugs are caught much faster ...
Why use bzero over memset?
...lient/server in C. When initializing the structs, like sock_addr_in , or char buffers (that we used to send data back and forth between client and server) the professor instructed us to only use bzero and not memset to initialize them. He never explained why, and I'm curious if there is a val...
How do I allow HTTPS for Apache on localhost?
...is being included. In my case I had to uncomment this line:
Include conf/extra/httpd-ssl.conf
In the SSL config httpd-ssl.conf I had to update the following lines:
Update SSLSessionCache "shmcb:C:\Program Files (x86)\Zend\Apache2/logs/ssl_scache(512000)" to SSLSessionCache "shmcb:C:/Progra\~2/Ze...
mongo - couldn't connect to server 127.0.0.1:27017
...o the mongod server.
This could be because the address was wrong (host or IP) or that it was not running. One thing to note is the log trace provided does not cover the "Fri Nov 9 16:44:06" of your mongo timestamp.
Can you:
Provide the command line arguments (if any) used to start your
mongod p...
What's wrong with Groovy multi-line String?
...two try to make "test" positive (and this is where it fails)
With the new String constructor method, the Groovy parser is still in the constructor (as the brace hasn't yet closed), so it can logically join the three lines together into a single statement
For true multi-line Strings, you can also u...
Maximum packet size for a TCP connection
...
Your 1480'ish should be 1460. The IP header and the TCP header take up 20 bytes each at least (unless optional header fields are used) and thus the max for (non-Jumbo frame) Ethernet is 1500 - 20 -20 = 1460.
– Evgeniy Berezovsky
...