During a code review, I came across the following code:
var a = { ... }; // an object filled with key-value pairs
for (var key in a) {
if (!angular.isUndefined(key)) {
do.stuff();
}
}
I am questioning whether key can ever be undefined or evaluate to
true</code according to <code>angular.isUndefinedvar a = { undefined: 'hello' }
When I tried this, it showed that undefined is actually recognized as a String.
I was wondering if the variable
keycould potentially have a value ofundefined
It is not possible for the key or property name of an object to be anything other than a string.
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