September 2017 Update
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14570 changed files with 153136 additions and 63871 deletions
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// you can freeze any object.
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b = [1, 2, 3];
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b[1] = 100; // returns [1, 100, 3]
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b.freeze; // make b immutable
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b[1] = 2; // throws an error ("Attempted write to immutable object.")
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