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by jankovicsandras
1203 days ago
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"
Negative indexing (.at(-1)): When indexing an array or a string, at can be used to
index from the end. It’s equivalent to arr[arr.length - 1)
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sic arr[arr.length-1) This is wrong. Array.at can get, but not set the value. So they're not equivalent. console.log( arr[arr.length-1] ); // works arr[arr.length-1] = 1; // works console.log( arr.at(-1) ); // works arr.at(-1) = 1; // ReferenceError: Invalid left-hand side in assignment |
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