What is navigator.userAgent.indexof

[learingperl01]

Hello I am completely new to Javascript and wondering if someone could shed some light in regards to the navigator.userAgent.indexof function.

Not quite sure that navigator.UserAgent.indexOf('WINXP')==-1 means.

What does the ==-1 mean does that make it true or false?

 

[Bong]

Usually "indexOf" refers to a method on a collection (dictionary, hash-table, whatever). "-1" would be the returned value when the collection does not include (in this case) 'WINXP'.

_________________
Bob Rashkin

 

[feherke]

Hi

Not quite sure that navigator.UserAgent.indexOf('WINXP')==-1 means.

navigator.        [gray]// navigator object's[/gray]
UserAgent.        [gray]// userAgent property[/gray]
indexOf('WINXP')  [gray]// contains the string 'WINXP' starting at position[/gray]
==                [gray]// equal with[/gray]
-1                [gray]// minus one[/gray]

In other words it does not contain the give substring. ( If contained a position number starting from 0 would be returned. )

Read some related quick references : [tt]Navigator[/tt], [tt]userAgent[/tt], [tt]indexOf()[/tt], [tt]==[/tt].

Feherke.

http://rootshell.be/~feherke/