${Object.keys(objects).length} objects loaded.
Open your browser's development console. Here's how. Then work as a group to define the following functions using simple arrow functions. As soon as a function works, put your group answer here.
getProp(name, property) to return the value
of property for name, if any, otherwise
undefined.
E.g., getProp('bird', 'airborne') should return
true and getProp('wren', 'airborne') should return
undefined.
Use the Lisp version as a guide.
getIsa(name) to return the isa value
for name if any, else undefined. E.g.,
getIsa('wren') should return
bird and getIsa('bird') should return
undefined.
Use the Lisp version
as a guide.
inheritProp(name, property) to return the
value (immediate or inherited) for property for
name, if any, otherwise undefined.
E.g., inheritProp('bird', 'airborne') should return
true, inheritProp('wren', 'airborne') should return
true, inheritProp('penguin', 'airborne') should return
false, and inheritProp('adelie-penguin', 'airborne') should return
true.
Use the Lisp version as a guide.