freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/6a2037a68a0bc2aef0006001.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a2037a68a0bc2aef0006001	Challenge 339: Array Chunks	29	challenge-339

--description--

Given an array and a chunk size, return the array split into sub-arrays of that size.

• The last chunk may be smaller if the array doesn't divide evenly.

--hints--

chunk_array([1, 2, 3, 4, 5, 6], 3) should return [[1, 2, 3], [4, 5, 6]].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(chunk_array([1, 2, 3, 4, 5, 6], 3), [[1, 2, 3], [4, 5, 6]])`)
}})

chunk_array([1, "two", 3, "four", 5, "six", 7, "eight"], 2) should return [[1, "two"], [3, "four"], [5, "six"], [7, "eight"]].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(chunk_array([1, "two", 3, "four", 5, "six", 7, "eight"], 2), [[1, "two"], [3, "four"], [5, "six"], [7, "eight"]])`)
}})

chunk_array([1, 2, 3, 4, 5], 3) should return [[1, 2, 3], [4, 5]].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(chunk_array([1, 2, 3, 4, 5], 3), [[1, 2, 3], [4, 5]])`)
}})

chunk_array(["a", "b", "c", "d", "e"], 1) should return [["a"], ["b"], ["c"], ["d"], ["e"]].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(chunk_array(["a", "b", "c", "d", "e"], 1), [["a"], ["b"], ["c"], ["d"], ["e"]])`)
}})

chunk_array([1, 2, 3], 5) should return [[1, 2, 3]].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(chunk_array([1, 2, 3], 5), [[1, 2, 3]])`)
}})

--seed--

--seed-contents--

def chunk_array(arr, size):

    return arr

--solutions--

def chunk_array(arr, size):
    return [arr[i:i + size] for i in range(0, len(arr), size)]