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Reorder levels of a factor without changing order of values
I have data frame with some numerical variables and some categorical factor variables. The order of levels for those factors is not the way I want them to be.
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How to determine an interface{} value's “real” type?
I have not found a good resource for using interface{} types. For example
7 Answers
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How to read a line from the console in C?
What is the simplest way to read a full line in a C console program
The text entered might have a variable length and we can't make any assumption about its content.
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How can I read and parse CSV files in C++?
I need to load and use CSV file data in C++. At this point it can really just be a comma-delimited parser (ie don't worry about escaping new lines and commas). The main need is a line-by-line parser that will return a vector for the next line each time the method is called.
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C++及Windows异常处理(try，catch; __try,__finally, __except) - C/C++ - ...
C++及Windows异常处理(try，catch; __try,__finally, __except)C++及Windows异常处理(try，catch; __try,__finally; __try, __except)一道笔试题引起的探究题目：
int* p = 0x00000000; // pointer to NULL
puts( "hello ");
__try{
puts( "in try ...
Why can't variables be declared in a switch statement?
I've always wondered this - why can't you declare variables after a case label in a switch statement? In C++ you can declare variables pretty much anywhere (and declaring them close to first use is obviously a good thing) but the following still won't work:
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What generates the “text file busy” message in Unix?
...hat operation generates the error "text file busy"? I am unable to tell exactly.
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What is the difference between decodeURIComponent and decodeURI?
What is the difference between the JavaScript functions decodeURIComponent and decodeURI ?
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Path.Combine absolute with relative path strings
I'm trying to join a Windows path with a relative path using Path.Combine .
7 Answers
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How can I get a JavaScript stack trace when I throw an exception?
If I throw a JavaScript exception myself (eg, throw "AArrggg" ), how can I get the stack trace (in Firebug or otherwise)? Right now I just get the message.
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