what is this code mean?

[cat5ives]

I'm trying to learn javascript from w3schools's website. I don't understand the code in red below. Is the code correct (are those 2 lines suppose to be 1 statement, the 1st semi colon should not be there)?

Thanks in advance.

function setCookie(c_name,value,exdays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate() + exdays);
[COLOR=#EF2929]var c_value=escape(value) + ((exdays==null) ? "" : "[COLOR=#204A87];[/color]
expires="+exdate.toUTCString());[/color]

document.cookie=c_name + "=" + c_value;
}

setCookie("username",username,365);

 

[feherke]

Hi

That is one line. The semicolon ( ; ) is part of the string.

Maybe this way is more evident :

[b]function[/b] [COLOR=darkgoldenrod]setCookie[/color][teal]([/teal]c_name[teal],[/teal]value[teal],[/teal]exdays[teal])[/teal]
[teal]{[/teal]
  [b]var[/b] exdate[teal]=[/teal][b]new[/b] [COLOR=darkgoldenrod]Date[/color][teal]();[/teal]
  exdate[teal].[/teal][COLOR=darkgoldenrod]setDate[/color][teal]([/teal]exdate[teal].[/teal][COLOR=darkgoldenrod]getDate[/color][teal]()[/teal] [teal]+[/teal] exdays[teal]);[/teal]
  [b]var[/b] c_value[teal]=[/teal][COLOR=darkgoldenrod]escape[/color][teal]([/teal]value[teal])[/teal] [teal]+[/teal] [teal](([/teal]exdays[teal]==[/teal][b]null[/b][teal])[/teal] [teal]?[/teal] [green][i]""[/i][/green] [teal]:[/teal] [green][i]"; expires="[/i][/green][teal]+[/teal]exdate[teal].[/teal][COLOR=darkgoldenrod]toUTCString[/color][teal]());[/teal]

  document[teal].[/teal]cookie[teal]=[/teal]c_name [teal]+[/teal] [green][i]"="[/i][/green] [teal]+[/teal] c_value[teal];[/teal]
[teal]}[/teal]

Feherke.
[link feherke.github.com/]

http://feherke.github.com/

[/url]

 

[ggriffit]

the conditional operator is shorthand for the IF statement, so :

var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
[code]

is the same as this longhand version

[code]
var c_value;
if ( exdays == null ) 
{
    c_value = escape(value);
}
else
{
   c_value = escape(value) + "; expires="+exdate.toUTCString()"; 
}

Greg Griffiths
Livelink Certified Developer & ECM Global Star Champion 2005 & 2006

http://www.greggriffiths.org/livelink/