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Ruby Ruby Core and Standard Library Ruby Core Struct

Daniel Crews
Daniel Crews
14,008 Points
Posted by Daniel Crews
Daniel Crews
14,008 Points

Struct Instantiation Not Working in Challenge

This instantiation method doesn't seem to work in the challenge:

Struct.new("Name", :first, :last)

Am I missing something?

struct.rb 
Struct.new("Name", :first, :last)

1 Answer

Nathan Williams
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.a{fill-rule:evenodd;}techdegree
Nathan Williams
Python Web Development Techdegree Student 6,851 Points
Nathan Williams
.a{fill-rule:evenodd;}techdegree
Nathan Williams
Python Web Development Techdegree Student 6,851 Points

this is actually a pretty tricky one, I tried the same thing at first, and it took me a few tries to understand what it was asking for here :). The key phrase in this case is "Create a Class...".

using 

Struct.new("Name", :first, :last)

returns a Struct::Name:

irb(main):001:0> Struct.new("Name", :first, :last)
=> Struct::Name

so you'd end up creating instances of this with 

Struct::Name.new("Nathan", "Williams")

but that's not a Name class, it's Struct::Name :/

The answer the challenge is looking for is more like

Name = Struct.new(:first, :last)

which returns an actual Name class, thereby satisfying the challenge requirements:

irb(main):002:0> Name = Struct.new(:first, :last)
=> Name

and lets you create instances via 

Name.new("Nathan", "Williams")

which I think reads a little nicer, and is the recommended way to do it according to the documentation.