Javascript methods that can not be called from jquery objects?

Question

I was reading Learning jQuery 1.3 (Jonathan Chaffer and Karl Swedberg) and while sorting table, they used .get() before calling .sort(), and said <

Answer 1

jQuery objects currently support 3 array methods:

var methods = 'pop push reverse shift sort splice unshift concat join slice toString indexOf lastIndexOf filter forEach every map some reduce reduceRight'.split(' ')
var implemented = $.grep(methods, function(m) {
    return $.prototype[m] == Array.prototype[m];
});
console.log(implemented); // => ["push", "sort", "splice"]

They also have slice, but it's not the same slice as arrays have:

$.prototype.slice === Array.prototype.slice // => false