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```
a => 'a' =~ m/b/,
b => 'asdf'
```
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```
'a', 'a' =~ m/b/, 'b', 'asdf'
```
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```
'a', 'b', 'asdf'
```

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a => scalar( 'a' =~ m/b/ ),
b => 'asdf'

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```
a => !!( 'a' =~ m/b/ ),
b => 'asdf'
```
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```
a => 'a' =~ m/b/ ? 1 : 0,
b => 'asdf'
```