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How to get overall CPU usage (e.g. 57%) on Linux [closed]
I am wondering how you can get the system CPU usage and present it in percent using bash, for example.
5 Answers
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How should I print types like off_t and size_t?
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You can use z for size_t and t for ptrdiff_t like in
printf("%zu %td", size, ptrdiff);
But my manpage says some older library used a different character than z and discourages use of it. Nevertheless, it's standardized (by t...
Script to kill all connections to a database (More than RESTRICTED_USER ROLLBACK)
I have a development database that re-deploy frequently from a Visual Studio Database project (via a TFS Auto Build).
12 An...
iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...理了，大家如果想看可以去看原文。
1.返回输入键盘
<UITextFieldDelegate>
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
2.CGRect
CGRectFromString(<#NSString *string#>)//有字符串恢复出矩形
CGR...
How to create a directory and give permission in single command
How to create a directory and give permission in single command in Linux?
8 Answers
8
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java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
I have the following string value: "walmart obama ????????"
11 Answers
11
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Combining node.js and Python
Node.js is a perfect match for our web project, but there are few computational tasks for which we would prefer Python. We also already have a Python code for them.
We are highly concerned about speed, what is the most elegant way how to call a Python "worker" from node.js in an asynchronous non-blo...
How to set auto increment primary key in PostgreSQL?
I have a table in PostgreSQL with 22 columns, and I want to add an auto increment primary key.
7 Answers
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How do I test if a string is empty in Objective-C?
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You can check if [string length] == 0. This will check if it's a valid but empty string (@"") as well as if it's nil, since calling length on nil will also return 0.
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How to check for a valid Base64 encoded string
Is there a way in C# to see if a string is Base 64 encoded other than just trying to convert it and see if there is an error? I have code code like this:
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