JavaScript thought: for...else and while...else statements

A feature that would be handy in JavaScript:
<br>
for...else statements:

// Loop through an array of people:
for (var i = 0, l = people.length; i < l; i++) console.log(people[i]);

// If we didn't enter the previous loop:
else console.log('No people! :(');

<br>
and while...else statements:

// Loop through an array of people:
var numPeople = people.length;
while (numPeople--) console.log(people[numPeople]);

// If we didn't enter the previous loop:
else console.log('No people! :(');

<br>
Here's another usage example (with for...else):

function removeKeys(object /*, keyStr1, keyStr2, etc.*/) {
 var args = arguments,
 hasOwnKey = {}.hasOwnProperty.call,
 key;

 // Loop through arguments last first not including the first argument:
 for (var numArgs = args.length; --numArgs;) {
 key = args[numArgs];
 delete object[key];
 }

 // If there was only one argument (the previous loop didn't execute):
 else for (key in object) {
 if (hasOwnKey(object, key)) delete object[key];
 }
};

<br>
and again with while...else:

function removeKeys(object /*, keyStr1, keyStr2, etc.*/) {
 var args = arguments,
 numArgs = args.length,
 hasOwnKey = {}.hasOwnProperty.call,
 key;

 // Loop through arguments last first not including the first argument:
 while (--numArgs) {
 key = args[numArgs];
 delete object[key];
 }

 // If there was only one argument (the previous loop didn't execute):
 else for (key in object) {
 if (hasOwnKey(object, key)) delete object[key];
 }
};

<br>
Thoughts?

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