Getting a new array is very much the point. We do this to avoid side effects that are difficult to track. It’s the same reason functions should return a value, not modify a reference.
Immutability by default is a solid strategy that helps avoid countless bugs. Only modify the original array when you have proven map to be a performance bottleneck - and it’s rare.
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Getting a new array is very much the point. We do this to avoid side effects that are difficult to track. It’s the same reason functions should return a value, not modify a reference.
Immutability by default is a solid strategy that helps avoid countless bugs. Only modify the original array when you have proven map to be a performance bottleneck - and it’s rare.