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Mail multipart/alternative vs multipart/mixed
...LDataSource;
import javax.mail.*;
import javax.mail.internet.*;
/**
*
* http://stackoverflow.com/questions/14744197/best-practices-sending-javamail-mime-multipart-emails-and-gmail
* http://stackoverflow.com/questions/3902455/smtp-multipart-alternative-vs-multipart-mixed
*
*
*
* @author dorae...
What are the effects of exceptions on performance in Java?
..., is just too long to post here. So let me summarize here and refer you to http://www.fuwjax.com/how-slow-are-java-exceptions/ for the gritty details.
The real question here is not "How slow are 'failures reported as exceptions' compared to 'code that never fails'?" as the accepted response might h...
Where do “pure virtual function call” crashes come from?
...r that can provide a stack trace of where the purecall happened; see here: http://www.lenholgate.com/blog/2006/01/purecall.html for more details.
(Note you can also call _set_purecall_handler() to install your handler in some versions of MSVC).
...
reformat in vim for a nice column layout
...
This is a great answer using vim macros: https://stackoverflow.com/a/8363786/59384 - basically, you start recording a macro, format the first column, stop recording then repeat the macro for all remaining lines.
Copy/pasted from that answer:
qa0f:w100i <Esc>...
Dump a mysql database to a plaintext (CSV) backup from the command line
...'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n'
From http://www.tech-recipes.com/rx/1475/save-mysql-query-results-into-a-text-or-csv-file/
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Skip certain tables with mysqldump
...mant.
More information of how to use the exclude option you can read here: https://dev.mysql.com/doc/refman/5.7/en/mysqlpump.html#mysqlpump-filtering
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C++ equivalent of java's instanceof
...{
return dynamic_cast<const Base*>(ptr) != nullptr;
}
Example: http://cpp.sh/6qir
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C++ template中typename和class的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...vi++)
;
return(i);
}
更详细的可以参考MSDN资料：
http://blogs.msdn.com/b/slippman/archive/2004/08/11/212768.aspx
C++ template typename class
Get keys from HashMap in Java
...
Check this.
https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html
(Use java.util.Objects.equals because HashMap can contain null)
Using JDK8+
/**
* Find any key matching a value.
*
* @param value The value to be matched...
Remove duplicated rows using dplyr
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...