大约有 40,000 项符合查询结果（耗时：0.0465秒） [XML]
How can I easily convert DataReader to List? [duplicate]
...a bit of typing and may reduce the number of errors when coding for DBNull etc. Once you cache the generated code they can be faster then most hand written code as well, so do consider the “high road” if you are doing this a lot.
See "A Defense of Reflection in .NET" for one example of this.
...
How to profile a bash shell script slow startup?
...another version that can output nanoseconds), do this at the beginning of /etc/bash.bashrc (or wherever you'd like to begin a trace in any Bash script):
PS4='+ $(date "+%s.%N")\011 '
exec 3>&2 2>/tmp/bashstart.$$.log
set -x
add
set +x
exec 2>&3 3>&-
at the end of ~/.bas...
What's the fastest way to do a bulk insert into Postgres?
...r consideration is the datamodel and the presence of constraints,triggers, etc.
My first approach is always: create a (temp) table with a structure similar to the target table (create table tmp AS select * from target where 1=0), and start by reading the file into the temp table.
Then I check what ...
How to quit android application programmatically
...g message
alertDialogBuilder
.setMessage("your message")
.setCancelable(false)
.setPositiveButton("YES"),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
...
Capture Stored Procedure print output in .NET
... be obvious but if there is no output from the proc (no print, raiseerror, etc.) then the event is not triggered. This stumped me for a while until I realized what was happening.
– IronRod
Aug 3 '16 at 17:41
...
ASP.NET MVC - Should business logic exist in controllers?
...s, skinny controllers.
For example, instead of having:
public interface IOrderService{
int CalculateTotal(Order order);
}
I would rather have:
public class Order{
int CalculateTotal(ITaxService service){...}
}
This assumes that tax is calculate by an external service, and requ...
Getting the difference between two sets
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This solution is not fully correct. Because the order of test1 and test2 makes a difference.
– Bojan Petkovic
Nov 1 '16 at 22:34
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How to properly override clone method?
...egalParameterException if your method requires the parameter by cloneable, etc. etc.).
Edit: Though overall I should point out that yes, clone() really is difficult to implement correctly and difficult for callers to know whether the return value will be what they want, doubly so when you consider ...
Why use apparently meaningless do-while and if-else statements in macros?
...ive in the real world. Unless we can guarantee that all the if statements, etc, in our code use braces, then wrapping macros like this is a simple way of avoiding problems.
– Steve Melnikoff
Nov 20 '13 at 17:16
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How can I programmatically create a new cron job?
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The best way if you're running as root, is to drop a file into /etc/cron.d
if you use a package manager to package your software, you can simply lay down files in that directory and they are interpreted as if they were crontabs, but with an extra field for the username, e.g.:
Filename: ...