Why I Like Perl

Character Classes

match any of these characters
characters listed in square braces
```
  /[aeiou]/
```
can be negated with leading caret
```
  /[^aeiou]/
```
ranges allowed
```
  /[a-z]/
```
other characters allowed
```
  /[a-j1-4&$]/
```
- '-' must come at front, else it makes a range
- '^' must not come at front, else it negates

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