Well, `String.prototype.match()` does this, it returns an array of
matches or `null` in case there are no matches. I agree that in some
situation this can be a source of errors, but the implementation would
be quite useful.
In case it's not acceptable, I would propose read-only members
`Array.prototype.first` and `Array.prototype.last`:
```js
Object.defineProperties(Array.prototype, {
first: {
get: function () {
return this[0];
}
},
last: {
get: function () {
if (this.length) {
return this[this.length - 1];
} else {
return void 0;
}
}
}
});
```
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