JavaScript Reference
Example:
//Sort numbers alphabetically and then numerically.
var arr = [700, 900, 6000, 80];
var numeric = function(x, y) {return x - y;};
arr.sort(); //arr is now [6000, 700, 80, 900]
arr.sort(numeric); //arr is now [80, 700, 900, 6000]
toString()
Syntax:
array .toString()
The method converts array to a string, which it re turns. The original array is not
changed.
The conversion is performed in two steps: First, every array element is converted to
a string. Second, all thus obtained strings are concatenated into a single string with
additional commas placed between them.
Example:
var arr = [1, 2, 3, 4];
var str = arr.toString(); //str is now "1,2,3,4".
str[3] //Returns ","
str[4] //Returns "3"
E.4 Boolean (Core JavaScript)
Boolean is one of the JavaScript fundamental data types. The Boolean object is a
wrapper around the prim itive boolean value. The essential role of this object is to
provide a toString() method, which converts boolean values true and false to
strings.
Object Instance Creation
Boolean() //Constructor
Syntax:
new Boolean(value ) //Constructor
Boolean(value ) //Type conversion function
When a boolean to string conversion is necessary, JavaScript often implicitly creates
a temporary Boole an o bject in ord er to be able to call its toString () method. Al-
though you will rarely need to create a Boolean object for yourself, you can do that
E.4. Boolean (Core JavaScript) 379
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