This table shows each JavaScript method in action...

JavaScript Result
undefined
Arrays
var a = new Array;
a.push(2,3);
a.push("Hello world.");
a[7] = 7;
a[10] = 10;
a.pop();
a.unshift("a","b","c");
a.shift();
a.splice(2,2,"one", "two");
Dates
var d = new Date;
d.toDateString();
d.toUTCString();
d.toTimeString();
d.toLocaleTimeString();
d.toLocaleDateString();
Numbers
(12.3456789).toFixed(5);
(12.3456789).toExponential(3);
(12.3456789).toPrecision(4);
Strings
"JavaScript".localeCompare("javascript");
"Java".localeCompare("javascript");
"JavaScript".charCodeAt(5);
"JavaScript".toLocaleUpperCase();
"JavaScript".toLocaleLowerCase();