Use of indexOf("?") and charAt(0)=="#" in JS

[avols143]

Hi.

 

I am new here and new to javascript Can som one help me to understands some codes?

 

 

if ((p=n.indexOf("?")) > 0 && parent.frames.length)

 

if (a[i+1].charAt(0)=="#"

 

See the attached file for details.

 

1. What means by question mark # and a number sign # in if statments above?

 

2. I want to remove check on first field mamed "Elevnummer" and from radio option.

 

3. How can I output the values of the objects

 

thanks

 

kurstorg_pameld_oslo.html

[davej]

See...

http://www.w3schools.com/jsref/jsref_obj_string.asp

 

Also you should probably use this tool on the original code...http://jsbeautifier.org/

 

Then you will want to single-step through the code using browser developer tools, such as...

https://developer.chrome.com/devtools/docs/javascript-debugging

[avols143]

Thanks Davej for nice tips. But I question is what means by using ? sign and # sign in JS codes.

 

? sign means any char?

 

# sign means only numbers?

[Ingolme]

No, it's literally looking for a "?" or "#" in the string. I haven't read the full source code, but I assume it's looking for the query string and hash in the URL. These are the parts of a URL:http://www.example.com/path/file.html?a=1#extra-dataProtocol Host name URI query string hash The query string always starts with a "?" and the hash always starts with "#"

[avols143]

Hi Foxy.

 

Thanks for ans. Those signs used with IF statments

 

if ((p=n.indexOf("?")) > 0 && parent.frames.length)

if (a[i+1].charAt(0)=="#"

[Ingolme]

Is that a question?