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Why .NET String is immutable? [duplicate]
...ow, String is immutable. What are the reasons for String being immutable and the introduction of StringBuilder class as mutable?
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How can I check whether a option already exist in select by JQuery
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And some like the manual approach, like me. This also combines the step of adding the boolean in there, instead of producing the 0 or 1 like the other does and having to convert it. I say both approaches are fine because yo...
Java - removing first character of a string
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Use substring() and give the number of characters that you want to trim from front.
String value = "Jamaica";
value = value.substring(1);
Answer: "amaica"
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Set margin size when converting from Markdown to PDF with pandoc
I have created an RMarkdown file in RStudio and managed to knit it with knitr into an HTML and .md file. Next, I used pandoc to convert the .md file into a PDF file (I get an error if I try and convert from the .html file). However, the PDF that is produced have massive margins (like this http://...
20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
20个命令行工具监控 Linux 系统性能原文出处：Tecmint.Com-Ravi Saive译文出处：Linux story-FOREST对于每个系统管理员或网络管理员来说，每天要监控和调试 Linux 系统性...原文出处： Tecmint.Com-Ravi Saive 译文出处：Linux story-FOREST
对于每...
What is the most efficient Java Collections library? [closed]
... lot of functionality over the normal collections in the JDK.
Personally (and I'm biased) I love Guava (including the former Google Java Collections project). It makes various tasks (including collections) a lot easier, in a way which is at least reasonably efficient. Given that collection operatio...
Grep only the first match and stop
... you. btw - are all those other arguments necessary that I have in the command? and what if I can't pipe it by chance (just in case).
– Tim Kamm
Dec 30 '12 at 18:48
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Android static object lifecycle
...ulate in another screen then user can edit search criteria from 3rd screen and goes to 4th screen.
4 Answers
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How to sort a dataframe by multiple column(s)
...1 Hi A 8 1
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R>
rather than using the name of the column (and with() for easier/more direct access).
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How do I expire a PHP session after 30 minutes?
I need to keep a session alive for 30 minutes and then destroy it.
15 Answers
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