GetDouble()

Goto: 4C Home | 4C Docs | 4C External Libraries Home | FCJSon Home | FCJSon Function List GetDouble()

GetDouble()

Purpose:

FCJSon::GetDouble() gets a double value from an object.

Usage:

fval = FCJSon::GetDouble(<jsonident> [, <key> ]);

Arguments:

integer <jsonident> - A valid json ident.

alpha <key> - Optional. The key to the double value in the object.

Returns:

float <fval> - A 4c float value.

If this value is equal to -1.0 it may indicate an error and the application should call sys.get_extfn("FCJSon","LastError") to determine if it is an error or a valid value. -1 - Error

Where Used:

FCJSon::GetDouble() can be called from anywhere.

Example:

Example

Description:

FCJSon::GetDouble() gets a double value from a JSon object. If the object identified by <jsonident> is a json double object and not a json object of <key>:<value> pairs, then no key is used. The normal case though is where <jsonident> identifies an object of "<key>","<value>" pairs and the double you are getting is in one of these pairs. When this is the case you must specify the <key> parameter to FCJSon::GetDouble()

Bugs/Features/Comments: