21 lines
364 B
Markdown
21 lines
364 B
Markdown
---
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title: spread
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tags: list
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---
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Implements javascript's `[].concat(...arr)`. Flattens the list(non-deep) and returns an list.
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```py
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def spread(arg):
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ret = []
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for i in arg:
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if isinstance(i, list):
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ret.extend(i)
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else:
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ret.append(i)
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return ret
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```
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```py
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spread([1,2,3,[4,5,6],[7],8,9]) # [1,2,3,4,5,6,7,8,9]
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``` |