${i%.*} 如何解释？

earwig

for i in `ls`;do mv $i ${i%.*}.bak;done

如上面这段代码，其中${i%.*}如何解释？

hbmhalley

${parameter%word}
${parameter%%word}
The word is expanded to produce a pattern just as in filename expansion. If the pattern matches a trailing portion of the expanded value of parameter, then the result of the expansion is the value of parameter with the shortest matching pattern (the ‘%’ case) or the longest matching pattern (the ‘%%’ case) deleted. If parameter is ‘@’ or ‘*’, the pattern removal operation is applied to each positional parameter in turn, and the expansion is the resultant list. If parameter is an array variable subscripted with ‘@’ or ‘*’, the pattern removal operation is applied to each member of the array in turn, and the expansion is the resultant list.

去扩展名的

earwig

hbmhalley 发表于 2012-05-17 14:00
去扩展名的

请教这个资料**？

hbmhalley

回复 3# earwig


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