大约有 43,000 项符合查询结果（耗时：0.0388秒） [XML]
How to clear the cache of nginx?
...nt to make a request to the cached page.
curl http://abcdomain.com/mypage.html -s -I -H "secret-header:true"
this will return a fresh copy of the item and it will also replace what's in cache.
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How to calculate number of days between two given dates?
...The relevant section of the docs:
https://docs.python.org/library/datetime.html.
See this answer for another example.
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Random color generator
...action see http://blog.adamcole.ca/2011/11/simple-javascript-rainbow-color.html.
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Java, List only subdirectories from a directory, not files
...in no recursion as expected docs.oracle.com/javase/7/docs/api/java/io/File.html#listFiles()
– headsvk
Feb 26 '18 at 12:02
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Pretty graphs and charts in Python [closed]
... examples (with according source code): matplotlib.sourceforge.net/gallery.html. However, I'd say that its API is, well..., complicated - method names are driving me crazy :) Speaking about "complicated" and simple examples - this blog post helped me a lot to start with matplotlib: shreevatsa.wordpr...
ALTER DATABASE failed because a lock could not be placed on database
...://learnmysql.blogspot.com/2012/05/database-is-in-transition-try-statement.html
USE master
GO
ALTER DATABASE <db_name>
SET OFFLINE WITH ROLLBACK IMMEDIATE
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ALTER DATABASE <db_name> SET ONLINE
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Changing every value in a hash in Ruby
...Rails way' method for this task :)
http://api.rubyonrails.org/classes/Hash.html#method-i-transform_values
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How would you count occurrences of a string (actually a char) within a string?
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SUPER SLOW! Tried it on a page of html and it took about 2 minutes as versus other methods on this page that took 2 seconds. The answer was correct; it was just too slow to be usable.
– JohnB
Jun 20 '12 at 21:51
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What is the equivalent of “none” in django templates?
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Your hint mixes presentation and logic by putting HTML in your model, doing exactly the opposite of what you are trying to teach. How about returning None if there is no name (logical behaviour for a data model) and then using the default_if_none filter in the template?
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How to enable MySQL Query Log?
...ET general_log = 1;
See http://dev.mysql.com/doc/refman/5.1/en/query-log.html
For mysql 5.1.29+
With mysql 5.1.29+ , the log option is deprecated. To specify the logfile and enable logging, use this in my.cnf in the [mysqld] section:
general_log_file = /path/to/query.log
general_log = 1
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