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80 lines
1.4 KiB
Markdown
80 lines
1.4 KiB
Markdown
---
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id: 698a1a73ade5ac0e19180fa6
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title: "Challenge 203: Flattened"
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challengeType: 29
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dashedName: challenge-203
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---
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# --description--
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Given an array, determine if it is flat.
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- An array is flat if none of its elements are arrays.
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# --hints--
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`is_flat([1, 2, 3, 4])` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_flat([1, 2, 3, 4]), True)`)
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}})
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```
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`is_flat([1, [2, 3], 4])` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_flat([1, [2, 3], 4]), False)`)
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}})
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```
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`is_flat([1, 0, False, True, "a", "b"])` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_flat([1, 0, False, True, "a", "b"]), True)`)
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}})
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```
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`is_flat(["a", [0], "b", True])` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_flat(["a", [0], "b", True]), False)`)
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}})
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```
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`is_flat([1, [2, [3, [4, [5]]]], 6])` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(is_flat([1, [2, [3, [4, [5]]]], 6]), False)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def is_flat(arr):
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return arr
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```
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# --solutions--
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```py
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def is_flat(arr):
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for el in arr:
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if isinstance(el, list):
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return False
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return True
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```
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