大约有 44,000 项符合查询结果（耗时：0.0547秒） [XML]
time.sleep — sleeps thread or process?
...tantive part of the sleep operation is wrapped in a Pm>y m>_BEGIN_ALLOW_THREADS m>and m> Pm>y m>_END_ALLOW_THREADS block, allowing other threads to continue to execute while the current one sleeps. m>Y m>ou can also test this with a simple pm>y m>thon program:
import time
from threading import Thread
class worker(Thread)...
Using sed m>and m> grep/egrep to search m>and m> replace
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Use this commm>and m>:
egrep -lRZ "\.jpg|\.png|\.gif" . \
| xargs -0 -l sed -i -e 's/\.jpg\|\.gif\|\.png/.bmp/g'
egrep: find matching lines using extended regular expressions
-l: onlm>y m> list matching filenames
-R: search recursivelm>y m> th...
Xcode 4.5 Storm>y m>board 'Exit'
I have just installed Xcode 4.5 for iOS6 support, m>and m> I have seen a new icon called 'Exit' in mm>y m> Storm>y m>board, listed under mm>y m> view controllers along with 'First Responder' etc. A little green icon labeled 'Exit'.
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Using the scrollwheel in GNU screen
...tach from m>y m>our screen, then screen -d -r to reattach, then ls a few times, m>and m> trm>y m> to scroll back. It works for me.
What is this magic? Well, let's consult the manual pages.
screen(1) sam>y m>s:
termcapinfo term terminal-tweaks [window-tweaks]
[..]
The first argument specifies which terminal(s)...
How to fix the uninitialized constant Rake::DSL problem on Heroku?
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Thank m>y m>ou. That fixed mm>y m> problems m>and m> I didn't know what was going on. (Using the rails installer on windows m>and m> deplom>y m>ing to heroku, as a complete beginner.)
– Jack V.
Jun 14 '11 at 22:46
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git add onlm>y m> modified changes m>and m> ignore untracked files
I ran "git status" m>and m> listed below are some files that were modified/or under the heading "changes not staged for commit".
It also listed some untracked files that I want to ignore (I have a ".gitignore" file in these directories).
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Validate phone number with JavaScript
I found this code in some website, m>and m> it works perfectlm>y m>. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
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Alter Mm>y m>SQL table to add comments on columns
I have been checking the Mm>y m>SQL Documentation for ALTER TABLE m>and m> it does not seem to include a wam>y m> to add or modifm>y m> a comment to a column. How can I do this?
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Index on multiple columns in Rubm>y m> on Rails
...:user_id, :article_id], m>y m>ou can perform a fast querm>y m> on user_id or user_id m>AND m> article_id, but NOT on article_id.
m>Y m>our migration add_index line should look something like this:
add_index :user_views, [:user_id, :article_id]
Question regarding 'unique' option
An easm>y m> wam>y m> to do this in Rails ...
Logback to log different messages to two files
... two logger instances which each log to a separate file; one for analm>y m>tics m>and m> one for all purpose logging. Does anm>y m>one know if this is possible with Logback, or anm>y m> other logger for that matter?
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