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How to remove all whitespace from a string?
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## [3] " \t\n\r\v\fx \t\n\r\v\fy \t\n\r\v\f"
## [4] NA
The base R approach: gsub
gsub replaces all instances of a string (fixed = TRUE) or regular expression (fixed = FALSE, the default) with another string. To remove all spaces, use:
gsub(" ", "", x, fixed = TRUE)
#...
简单谈谈软件配置管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...者知道变了什么？为什么变？变化前后的状态是什么？
4、配置审计
IEEE中的定义：确认产品的完整性并维护构件间的一致性，即确保产品是一个严格定义的构件集合。
可以理解为：验证软件产品的构造是否符合需求、标准、...
How can I define an interface for an array of objects with Typescript?
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edited Aug 13 at 2:45
Dane Brouwer
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Can virtual functions have default parameters?
...ng std::cout;
using std::endl;
struct Base { virtual string Speak(int n = 42); };
struct Der : public Base { string Speak(int n = 84); };
string Base::Speak(int n)
{
stringstream ss;
ss << "Base " << n;
return ss.str();
}
string Der::Speak(int n)
{
stringstream ss;
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Eliminate extra separators below UITableView
When I set up a table view with 4 rows, there are still extra separators lines (or extra blank cells) below the filled rows.
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Number of days between two NSDates [duplicate]
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411
Here's an implementation I used to determine the number of calendar days between two dates:
+...
How to automatically generate N “distinct” colors?
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14 Answers
14
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How to save a Python interactive session?
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417
IPython is extremely useful if you like using interactive sessions. For example for your use-c...
Why does this Java program terminate despite that apparently it shouldn't (and didn't)?
...a chain of events I lost $12 million of equipment. I've narrowed down over 40K lines in the faulty module to this:
5 Answer...
Can I get the name of the currently running function in JavaScript?
... MattMatt
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