2017年3月10日 · Some of Vim's command names are obtuse to me and seem to have multiple aliases. It's easier for me to remember things if I know the reason they are used so... What does :wq stand for, if anything?...

2015年11月15日 · I have a problem with following method. The method generate a valid query, but it cannot insert the table monitor. The method: public void upLoadData(String table, String[] dbCols,List<LinkedH...

2013年1月17日 · Is there any difference between (\w+)? and (\w*) in regex? It seems the same, doesn't it?

2016年3月29日 · The two forward-slashes /.../ contains a regexe. The leading ^ and trailing $ match the beginning and the ending of the input string, respectively.

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2010年6月22日 · In your examples the exclamation point means to force the action (e.g. :w! will overwrite an existing file and :q! will quit without saving).

The main difference is w+ truncate the file to zero length if it exists or create a new file if it doesn't. . While r+ neither deletes the content nor create a new file if it doesn't

2014年2月7日 · These are all lookahead assertions (positive and negative) that are making sure the following text respects some rules without actually capturing the text.

2012年10月10日 · What is C? The optimization problem SVM training solves has two terms: A regularization term that benefits "simpler" weights

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