大约有 36,010 项符合查询结果（耗时：0.0372秒） [XML]
Building a minimal plugin architecture in Python
...t's a nice-to-have.
Of course, any requirement that comes along saying "I don't need [big, complicated thing] X; I just want something lightweight" runs the risk of re-implementing X one discovered requirement at a time. But that's not to say you can't have some fun doing it anyway :)
...
Why do I get “Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'.” when I try t
Why do I get this error
3 Answers
3
...
You can't specify target table for update in FROM clause
...
The problem is that MySQL, for whatever inane reason, doesn't allow you to write queries like this:
UPDATE myTable
SET myTable.A =
(
SELECT B
FROM myTable
INNER JOIN ...
)
That is, if you're doing an UPDATE/INSERT/DELETE on a table, you can't reference that table ...
Ordering by the order of values in a SQL IN() clause
..., 'c')
will return 1
FIELD('a', 'c', 'b', 'a')
will return 3
This will do exactly what you want if you paste the ids into the IN() clause and the FIELD() function in the same order.
share
|
impr...
Pass ruby script file to rails console
...
This works great. But unless I'm doing something wrong, you do not have access to objects created inside the script. Any way to do that? The use case is to set up some objects, then interactively explore them. Is that possible?
– Dan Ba...
Counter increment in Bash loop not working
...FILE) + 1]
# Store the new value
echo $COUNTER > $TEMPFILE
# Loop done, script done, delete the file
unlink $TEMPFILE
share
|
improve this answer
|
follow
...
Is XSLT worth it? [closed]
...
Advantages of XSLT:
Domain-specific to XML, so for example no need to quote literal XML in the output.
Supports XPath/XQuery, which can be a nice way to query DOMs, in the same way that regular expressions can be a nice way to query strings.
Fun...
Do I need to heartbeat to keep a TCP connection open?
...lives is o keep the connection open through nat gateways. While TCP itself doesn't need keepalives to operate, it's common for nat gateways to "drop" a tcp connection after a given timeout.
– nos
Nov 30 '09 at 23:48
...
Is there a max array length limit in C++?
...hat would otherwise use up all the available memory.
Apart from that, C++ doesn't enforce any limits.
share
|
improve this answer
|
follow
|
...
What's the difference between a proc and a lambda in Ruby?
...
The real difference between procs and lambdas has everything to do with control flow keywords. I am talking about return, raise, break, redo, retry etc. – those control words. Let's say you have a return statement in a proc. When you call your proc, it will not only dump you out of it, ...