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Bash: If/Else statement in one line
I am trying to check if a process (assume it is called some_process ) is running on a server. If it is, then echo 1, otherwise echo 0.
...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Swift 编程语言入门教程本文从其发布的书籍《The Swift Programming Language》中摘录和提取而成。希望对各位的iOS&OSX开发有所帮助。今天在网上看到一篇非常好的教程，分享给大家
原文地址：http://gashero.iteye.com/blog/2075324
目录
1 ...
What's the difference between and in servlet
...ntext:annotation-config in both applicationContext and servlet, especially if I use different base packages in component-scan tag?
– glaz666
Oct 20 '10 at 13:50
2
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How to prevent XSS with HTML/PHP?
...owever, when you need to allow HTML input things get a little trickier and if this is the case I recommend you use something like htmlpurifier.org
– Alix Axel
Jan 3 '10 at 20:23
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Shell equality operators (=, ==, -eq)
Can someone please explain the difference between = , == and -eq in shell scripting?
4 Answers
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Is a url query parameter valid if it has no value?
..., along with
data in the path component (Section 3.3), serves to identify a
resource within the scope of the URI's scheme and naming authority
(if any). ...
... However, as query components
are often used to carry identifying information in the form of
"key=value" pai...
Count with IF condition in MySQL query
... sum() in place of count()
Try below:
SELECT
ccc_news . * ,
SUM(if(ccc_news_comments.id = 'approved', 1, 0)) AS comments
FROM
ccc_news
LEFT JOIN
ccc_news_comments
ON
ccc_news_comments.news_id = ccc_news.news_id
WHERE
`ccc_news`.`category` = 'news_layer2'
...
Make copy of an array
...,2,3,4,5] . I need to make an exact duplicate copy of a and call it b . If a were to change to [6,7,8,9,10] , b should still be [1,2,3,4,5] . What is the best way to do this? I tried a for loop like:
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Why do I need 'b' to encode a string with Base64?
... string of 8-bit bytes. You create those in Python 3 with the b'' syntax.
If you remove the b, it becomes a string. A string is a sequence of Unicode characters. base64 has no idea what to do with Unicode data, it's not 8-bit. It's not really any bits, in fact. :-)
In your second example:
>>...
Begin, Rescue and Ensure in Ruby?
... # code that deals with some other exception
else
# code that runs only if *no* exception was raised
ensure
# ensure that this code always runs, no matter what
# does not change the final value of the block
end
You can leave out rescue, ensure or else. You can also leave out the variables i...