大约有 40,000 项符合查询结果（耗时：0.0483秒） [XML]
How to configure an existing git repo to be shared by a UNIX group
...isting git repo (a bare one) which has up to this point only been writable by me. I want to open it up to some UNIX user group, foo, so that all members of foo can push to it. I'm aware that I can easily set up a new git repo with:
...
How do I create delegates in Objective-C?
...
@end
Then, in the body, we can check that our delegate handles messages by accessing our delegateRespondsTo struct, rather than by sending -respondsToSelector: over and over again.
Informal Delegates
Before protocols existed, it was common to use a category on NSObject to declare the methods a ...
How could the UNIX sort command sort a very large file?
...or this purpose. On a 4 processor machine it improved the sort performance by 100% !
#! /bin/ksh
MAX_LINES_PER_CHUNK=1000000
ORIGINAL_FILE=$1
SORTED_FILE=$2
CHUNK_FILE_PREFIX=$ORIGINAL_FILE.split.
SORTED_CHUNK_FILES=$CHUNK_FILE_PREFIX*.sorted
usage ()
{
echo Parallel sort
echo usage: ps...
Is there a goto statement in Java?
...d, but it is marked as "not used".
It was in the original JVM (see answer by @VitaliiFedorenko), but then removed. It was probably kept as a reserved keyword in case it were to be added to a later version of Java.
If goto was not on the list, and it gets added to the language later on, existing co...
Error in finding last used cell in Excel with VBA
... LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious, _
MatchCase:=False).Row
Else
lastrow = 1
End If
End With
Find Last Row in a Table (ListObject)
The same principles apply,...
General suggestions for debugging in R
...error occurs, the first thing that I usually do is look at the stack trace by calling traceback(): that shows you where the error occurred, which is especially useful if you have several nested functions.
Next I will set options(error=recover); this immediately switches into browser mode where the ...
Why should I use tags vs. release/beta branches for versioning?
...e mainly used for future reference to the specific version of the project, by tagging a commit. You can always use branches of course, but if you change versions a lot, you will end up with lots of unused or rarely used branches.
Practically, tags are branches without branches anyway, just adding a...
Get the new record primary key ID from MySQL insert query?
...n the server on a per-connection basis. This means that the value returned by the function to a given client is the first AUTO_INCREMENT value generated for most recent statement affecting an AUTO_INCREMENT column by that client.
So the value returned by LAST_INSERT_ID() is per user and is unaffec...
psql: FATAL: database “” does not exist
...
psql -d template1
works for you is that template1 is a database created by postgres itself, and is present on all installations.
You are apparently able to log in to template1, so you must have some rights assigned to you by the database. Try this at a shell prompt:
createdb
and then see if y...
How do I get the value of a textbox using jQuery?
...rbatim answers to multiple questions, these tend to be flagged as "spammy" by the community. If you're doing this then it usually means the questions are duplicates so flag them as such instead: stackoverflow.com/questions/1320088
– Kev
Mar 8 '12 at 23:55
...