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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
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3. lsof — 打开文件列表
lsof 命令对于很多 Linux/Uni...
Difference between LoadFile and LoadFrom with .NET Assemblies?
...ntation and I am still a little confused on what exactly is the difference between using LoadFile and LoadFrom when loading an assembly. Can someone provide an example or an analogy to better describe it. The MSDN documentation confused me more. Also, Is ReflectionOnlyLoadFrom the same as Loa...
get NSDate today, yesterday, this Week, last Week, this Month, last Month… variables
...NSDate today, yesterday, this Week, last Week, this Month, last Month variables ready for comparison for headers to be added on UITableView's titleForHeaderInSection
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Undoing a git rebase
Does anybody know how to easily undo a git rebase?
18 Answers
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Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
I'm trying to POST a List of custom objects.
My JSON in request body is this:
12 Answers
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Emacs, switch to previous window
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That'd be C-- C-x o
In other words, C-x o with an argument of -1. You can specify how many windows to move by inserting a numeric argument between C-u and the command, as in C-u 2 C-x o. (C-- is a shortcut for C-u - 1)
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mysql create user if not exists
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In 5.7.6 and above, you should be able to use CREATE USER
CREATE USER IF NOT EXISTS 'user'@'localhost' IDENTIFIED BY 'password';
Note that the 5.7.6 method doesn't actually grant any permissions.
If you aren't using a version which h...
MySQL InnoDB not releasing disk space after deleting data rows from table
I have one MySQL table using the InnoDB storage engine; it contains about 2M data rows. When I deleted data rows from the table, it did not release allocated disk space. Nor did the size of the ibdata1 file reduce after running the optimize table command.
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How does one reorder columns in a data frame?
...ws, and the 1,2,3,4 refers to the columns.
To change the order as in the above question do df2[,c(1,3,2,4)]
If you want to output this file as a csv, do write.csv(df2, file="somedf.csv")
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How to simulate a mouse click using JavaScript?
I know about the document.form.button.click() method. However, I'd like to know how to simulate the onclick event.
7 An...