大约有 40,000 项符合查询结果（耗时：0.0491秒） [XML]
How can I open multiple files using “with open” in Python?
...ption
If you are interested in the details, here is a generic example in order to explain how ExitStack operates:
from contextlib import ExitStack
class X:
num = 1
def __init__(self):
self.num = X.num
X.num += 1
def __repr__(self):
cls = type(self)
re...
What is Pseudo TTY-Allocation? (SSH and Github)
... could type command.
GitHub only wants to reply to your ssh request, in order to ascertain that the ssh command does work (you have the right public/private keys, and the public one has been registered to your GitHub account)
PuTTy would be an example of a terminal emulator, serial console and n...
When does System.getProperty(“java.io.tmpdir”) return “c:\temp”
...ction checks for the existence of environment
variables in the following order and uses the first path found:
The path specified by the TMP environment variable.
The path specified by the TEMP environment variable.
The path specified by the USERPROFILE environment variable.
The Windo...
When is it appropriate to use C# partial classes?
...
how does one know which one is for IF1, or IF2 .. by the order of declaration of classes ?
– kuldeep
Aug 8 '15 at 8:38
20
...
Remove all subviews?
...moveFromSuperview()
}
NOTE
You should NOT remove the subviews in normal order, since it may cause a crash if a UIView instance is deleted before the removeFromSuperview message has been sent to all objects of the array. (Obviously, deleting the last element would not cause a crash)
Therefore, t...
Debug vs. Release performance
...olved that slows down the program. For this particular code, it was on the order of 0.2-0.3 seconds runtime on its own, and 30+ seconds when the debugger was attached.
Simple solution though, just remove the debug messages that was no longer needed.
...
Drop multiple tables in one shot in mysql
...ks = 1;
Then you do not have to worry about dropping them in the correct order, nor whether they actually exist.
N.B. this is for MySQL only (as in the question). Other databases likely have different methods for doing this.
...
Passing route control with optional parameter after root in express?
...ext() inside the callback.
According to this, handlers are invoked in the order that they are added, so as long as your next route is app.get('/', ...) it will be called if there is no key.
share
|
...
How to execute a raw update sql with dynamic binding in rails
...getting composite_primary_keys to function with activerecord 2.3.8. So in order to access the sqlserver 2000 table with a composite primary key, raw sql was required.
sql = "update [db].[dbo].[#{Contacts.table_name}] " +
"set [COLUMN] = 0 " +
"where [CLIENT_ID] = '#{contact.CLIENT_ID}'...
A connection was successfully established with the server, but then an error occurred during the pre
...ry, I begun to notice this kind of error.
I had to change the algorithm in order to make a better use of RAM.
To be noted that while some threads threw this exception, some other threw:
System.Data.SqlClient.SqlException (0x80131904): Connection Timeout Expired. The timeout period elapsed whil...