大约有 15,208 项符合查询结果（耗时：0.0467秒） [XML]
Explain the use of a bit vector for determining if all characters are unique
...ify the size in constructor.
API. With bit vectors you will have easier to read code, probably something like this:
vector.SetFlag(4, true); // set flag at index 4 as true
for int you will have lower-level bit logic code:
checker |= (1 << 5); // set flag at index 5 to true
Also probably i...
How to get the input from the Tkinter Text Widget?
..._Box.get("1.0",END)
The first part, "1.0" means that the input should be read from line one, character zero (ie: the very first character). END is an imported constant which is set to the string "end". The END part means to read until the end of the text box is reached. The only issue with this is...
MySQL: @variable vs. variable. What's the difference?
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@Pacerier: Am I reading the docs wrong? """To indicate explicitly that a variable is a session variable, precede its name by SESSION, @@session., or @@."""
– RobM
Apr 25 '15 at 16:32
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How to exit an if clause
... @ephemient: That's funny, is there more to the story? I'd like to read the whole thing.
– Roman
Jan 15 '10 at 5:51
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When to use static vs instantiated classes
...believe is the overly-complicated sounding term for this. LOTS and lots of reading on it all over SO and google-land. As far as "singletons" go, here is something that really made me think: slideshare.net/go_oh/… A talk on why PHP singletons really don't make any sense. Hope this contributes a lit...
Run cron job only if it isn't already running
...job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do what I'm looking for...
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Linux command to list all available commands and aliases
...ash built-in, not a separate command with its own man page. You'll need to read the bash(1) man page, or run help compgen at a bash command line.
– camh
Aug 23 '17 at 20:48
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Git in Powershell saying 'Could not find ssh-agent'
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For those looking for a detailed explanation have a read of this blog post. Below is a quote from the blog post. Ultimately the ssh-agent.exe needs to be in the path, or resolved some other way.
EDIT:
It appears most of the people don't bother reading the linked blog and the o...
Styling HTML email for Gmail
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As others have said, some email programs will not read the css styles. If you already have a web email written up you can use the following tool from zurb to inline all of your styles:
http://zurb.com/ink/inliner.php
This comes in extremely handy when using templates like...
How to establish a connection pool in JDBC?
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Don't reinvent the wheel.
Try one of the readily available 3rd party components:
Apache DBCP - This one is
used internally by Tomcat, and by
yours truly.
c3p0
Apache DBCP comes with different example on how to setup a pooling javax.sql.DataSource. Here is one s...