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by masklinn
2515 days ago
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> What looks out of place to you in that example? Most languages don't have sparse arrays so it's really weird. > Would it make more sense to you with a very slightly less arbitrary example, perhaps arr = ['Value for 0', 'Value for 1', , 'Value for 3', 'Value for 4']; instead of simple mapping ints to ints? You'd usually put an explicit `null` there, especially as HOFs skip "empty" array cells so ['Value for 0', 'Value for 1', , 'Value for 3', 'Value for 4'].map(_=>1)
returns [1, 1, , 1, 1]
which is rarely expected or desirable. |
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