parseAs(type, expression);
Converts Angular expression into a function. This is like $parse and is identical when the expression is a literal constant. Otherwise, it wraps the expression in a call to $sce.getTrusted(type, result) 
Parameters
Param Type Details  type   string   The kind of SCE context in which this result will be used.   expression   string   String expression to compile.  
Returns
function(context, locals) 
a function which represents the compiled expression: 
context â {o