大约有 47,000 项符合查询结果（耗时：0.0677秒） [XML]
mongo - couldn't connect to server 127.0.0.1:27017
...
Normally this caused because you didn't start mongod process before you try starting mongo shell.
Start mongod server
mongod
Open another terminal window
Start mongo shell
mongo
...
Batch: Remove file extension
...
In case the file your variable holds doesn't actually exist the FOR approach won't work. One trick you could use, if you know the length of the extension, is taking a substring:
%var:~0,-4%
the -4 means that the last 4 digits (presumably .ext) will be truncated.
...
SQL - many-to-many table primary key
...at the table sorted, just the index. And the index won't be stored sequentially, it'll be stored in an efficient manner to be able to be retrieved quickly.
In addition, the vast majority of database tables are read far more often than written. That makes anything you do on the select side far more ...
Which library should I use for server-side image manipulation on Node.JS? [closed]
...t sure which of those are more mature and provide better performance. Basically I want to do the following:
3 Answers
...
psql invalid command \N while restore sql
...
Postgres uses "\N" as substitute symbol for NULL value. But all psql commands starts by backslash "\" symbol. So you can get this messages, when probably copy statement fails, but a loading of dump continues. This message is only false alarm. You have to search a lines before for reas...
How to choose between Hudson and Jenkins? [closed]
... understand why, you need to know the history of the project. It was originally open source and supported by Sun. Like much of what Sun did, it was fairly open, but there was a bit of benign neglect. The source, trackers, website, etc. were hosted by Sun on their relatively closed java.net platform....
Create a new cmd.exe window from within another cmd.exe prompt
...
make sure you check out all the different options for start "start /?" /wait and /I can be usefull.
– Peter Gfader
Dec 20 '08 at 23:43
...
How does HashSet compare elements for equality?
...the IEqualityComparer<T>.GetHashCode to find the hash code, then for all elements with the same hash code, it will use IEqualityComparer<T>.Equals to compare for actual equality.
That means you have two options:
Pass a custom IEqualityComparer<T> into the constructor. This is th...
Render a string in HTML and preserve spaces and linebreaks
...
you can use css to change the style. i just wrote a really basic example. you can use <pre> tag or use css as per @pete's answer.
– N30
Feb 29 '12 at 2:30
...
Python string prints as [u'String']
This will surely be an easy one but it is really bugging me.
10 Answers
10
...