hasOwnProperty
In Chapter 3, the hasOwnProperty
method was offered as a filter to work around a
problem with the for in
statement. Unfortunately,
hasOwnProperty
is a method, not an operator,
so in any object it could be replaced with a different function or even a value that
is not a function:
var name; another_stooge.hasOwnProperty = null; // trouble for (name in another_stooge) { if (another_stooge.hasOwnProperty(name)) { // boom document.writeln(name + ': ' + another_stooge[name]); } }
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