Index(es) needs to be string and JS will automatically convert anything used as object's index to a string. ['b'].toString() happens to be equal to 'b' (its same as ['b'].join(',')).
['b'].toString()
['b'].join(',')
Looks like it.
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Index(es) needs to be string and JS will automatically convert anything used as object's index to a string.
['b'].toString()
happens to be equal to 'b' (its same as['b'].join(',')
).Looks like it.