interpreter: Add a flatten() method to arrays #14586
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keith-packard
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May 9, 2025
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This allows users to do two things, flatten potentially nested arrays
themselves, and, to safely convert types that may be an array to not an
array.
```meson
x = [meson.get_external_property('may_be_array)].flatten()
```
```meson
x = ['a', ['b', 'c']]
assert(x.flatten() == ['a', 'b', 'c'])
```
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This allows users to do two things, flatten potentially nested arrays themselves, and, to safely convert types that may be an array to not an array.