[英]How do I grep this pattern with regular-expression in shell?
I want to grep the pattern like "1-10","10-20","1-9"(without double quotes) with the following code: 我想使用以下代码grep模式如“1-10”,“10-20”,“1-9”(不带双引号):
grep '[[:digit:]]\-[[:digit:]]' mydoc
It is ok to grep "1-9" but I can't figure out how to grep other two patterns! grep“1-9”是可以的,但我无法弄清楚如何grep其他两个模式!
The minus needs no masking. 减号不需要掩盖。 + allows multiple occurrences.
+允许多次出现。
egrep '[0-9]+-[0-9]+' mydoc
grep -E '[[:digit:]]+-[[:digit:]]+' mydoc
grep -E '[[:digit:]]{1,2}-[[:digit:]]{1,2}' mydoc
?
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