slice( ) - Javascript

The "slice( )" method is that which extract part of an string and gives an new string, requiring this method a number that indicates the index position and other that indicates the final position being this the total of the last letter number + 1 equal at the real position. The basic structure is the following:

string.slice(beginning, finish)

There are some cases where the structure only is composed of one argument that only indicates the position where we will make the extraction. This is an example:

var url = "http://www.yahoo.es";
document.write(url.slice(7));

In this example, the code will extract the characters that are from the indicated position.

In the following case the code will extract the characters from a position to other, looking for example this code block:

var frase = "La sociedad es el motor del futuro";
document.write(frase.slice(4,10));

In this example, the code will write the characters from an associated position with number 4 to the 10th (it has assigned the number nine but like it's a final argument we will add 1 being indicated 10, the real position), being the written message "ociedad".