ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
50 lines
543 B
Markdown
50 lines
543 B
Markdown
---
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id: 5e9a0a8e09c5df3cc3600ed4
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challengeType: 11
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videoId: v-7Y7koJ_N0
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dashedName: accessing-and-changing-elements-rows-columns
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---
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# --question--
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## --text--
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What code would change the values in the 3rd column of both of the following Numpy arrays to 20?
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```py
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a = np.array([[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]])
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# Output:
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# [[ 1 2 20 4 5]
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# [ 6 7 20 9 10]]
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```
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## --answers--
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```python
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a[:, 3] = 20
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```
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---
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```python
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a[2, :] = 20
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```
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---
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```python
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a[:, 2] = 20
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```
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---
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```python
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a[1, 2] = 20
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```
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## --video-solution--
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3
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