Question

Is there any method in JS named _addFunctionCall ? I came across following line in a legacy application.
Method defination:

i2b2.ONT.ajax._addFunctionCall( "GetNameInfo",
                                "{{{URL}}}getNameInfo", 
                                i2b2.ONT.cfg.msgs.GetNameInfo,
                                null,
                                i2b2.ONT.cfg.parsers.ExtractConcepts);   

Method call:

var results = i2b2.ONT.ajax.GetNameInfo("ONT:FindBy", searchOptions);   

My another question is GetNameInfo method call contains only two parameters while it seems that method defination contains more than two parameters.So how things work here ?

Answer 1

1. That appears to be code from the proprietary “i2b2.ONT” library; google for it; https://community.i2b2.org/wiki/display/NCBO/NCBO+Ontology+Tools
2. The number of arguments passed to a js function does not need to match the number the function was declared with.
   An argument not passed will be undefined within the function (just like any other uninitialized variable) & extra arguments can be read within the function via arguments[ordinal].