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2018grep_motifs [2018/09/10 11:33] david [Variable length patterns] |
2018grep_motifs [2018/09/10 11:37] david |
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{n,m} The preceding item is matched at least n times, but not more than m times. | {n,m} The preceding item is matched at least n times, but not more than m times. | ||
</code> | </code> | ||
+ | |||
+ | Regular expressions are a general concept, but different commands may have different limitations on what they support. | ||
+ | There are more operators, patterns, and capabilities of regular expressions, but like most things we've encountered, YOU MUST TEST each command to make sure it works as expected. |