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How do I remove the first characters of a specific column in a table?
...mn in a table? Column name is Student Code and an example value is ABCD123Stu1231 .
I want to remove first 4 chars from my table for all records
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Reorder levels of a factor without changing order of values
... relevant difference between the datasets.
– CoderGuy123
Dec 27 '15 at 21:49
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How to create the most compact mapping n → isprime(n) up to a limit N?
...0 % |
| False | 921,502 | 92.2 % |
| True | 78,498 | 7.8 % |
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| f | is_prime | t min (us) | t mean (us) | t max (us) |
|-------------|----...
When is a CDATA section necessary within a script tag?
...answered Sep 20 '09 at 9:05
user123444555621user123444555621
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How to use a variable to specify column name in ggplot
... whoever heard of ensym() before? BIG SIGH
– CoderGuy123
Jun 4 '19 at 14:37
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Format decimal for percentage values?
...complete example:
using System.Globalization;
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decimal myValue = -0.123m;
NumberFormatInfo percentageFormat = new NumberFormatInfo { PercentPositivePattern = 1, PercentNegativePattern = 1 };
string formattedValue = myValue.ToString("P2", percentageFormat); // "-12.30%" (in en-us)
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Bash tool to get nth line from a file
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I have a unique situation where I can benchmark the solutions proposed on this page, and so I'm...
C++, copy set to vector
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123
Just use the constructor for the vector that takes iterators:
std::set<T> s;
//...
st...
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
...取电话号码，去掉数字之间的-
NSString *originalString = @"(123)123123abc";
NSMutableString *strippedString = [NSMutableString stringWithCapacity:originalString.length];
NSScanner *scanner = [NSScanner scannerWithString:originalString];
NSCharacterSet *numbers = [NSCharacterSet char...
How to get an enum value from a string value in Java?
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123
Here's a nifty utility I use:
/**
* A common method for all enums since they can't have anot...