摘要： 方法一：SELECT CAST('123' AS SIGNED);方法二：SELECT CONVERT('123',SIGNED);方法三：SELECT '123'+0; 阅读全文

摘要： R语言拆分字符串 aaa<-"aa;bb;cc"ccc<-strsplit(aaa,split=";") bbb<- unlist(strsplit(aaa,split=";")) ; bbbbbb[2]str(bbb)length(bbb) 阅读全文

摘要： A monospaced font, also called a fixed-pitch, fixed-width, or non-proportional font, is a font whose letters and characters each occupy the same amoun 阅读全文

摘要： 在线序列转换的工具： Nucleotide Sequence Translation Protein Sequence Back-translation http://bio.lundberg.gu.se/edu/translat.html http://www.ebi.ac.uk/Tools/st 阅读全文

摘要： http://tool.lu/regex/ http://tool.lu/regex/ http://regexr.com/ https://txt2re.com/index.php3 http://www.regular-expressions.info/regexmagic.html 阅读全文

摘要： 错误： org.eclipse.swt.custom.StyledText.getScrollbarsMode()I 解决方法； 1 卸载，并手工清除myeclipse全部文件 2 重新安装myeclipse 阅读全文

摘要： MySQL修改表一次添加多个列(字段) ALTER TABLE table_name ADD func varchar(50), ADD gene varchar(50), ADD genedetail varchar(50); MySQL修改表一次添加多个索引ALTER TABLE table_n 阅读全文

摘要： show processlist;show processlist\G;SHOW FULL PROCESSLIST;SHOW FULL PROCESSLIST\G;REF:http://dev.mysql.com/doc/refman/5.7/en/show-processlist.htmlhttp 阅读全文

摘要： 1. CREATE TABLE new_table LIKE table; 2. INSERT INTO new_table SELECT * FROM table; 3&4. RENAME TABLE table = old_table, table = new_table; The usual 阅读全文

摘要： ?unlist Given a list structure x, unlist simplifies it to produce a vector which contains all the atomic components which occur in x.unlist(v.row)[1] 阅读全文