example not compiles(((

[Taras]

error[E0277]: the trait bound `Result<DataSet, Box<dyn std::error::Error>>: Extractable` is not satisfied

 |     .train(&data, 20_000);
 |            ^^^^^ the trait `Extractable` is not implemented for `Result<DataSet, Box<dyn std::error::Error>>`
...

rust:
stable-x86_64-unknown-linux-gnu installed - rustc 1.52.1 (9bc8c42bb 2021-05-09)

[Mikhail Kravets]

Sorry to hear that , @221V 😞

I'd like to help but I totally forgot Rustlang. So, I have to ask a help of the community

[Andrew]

Seems like you edited the example just a little. Please show the whole code

[Taras]

@andrei-lus, no, i take example 'Classic XOR' as-is, just try again --

$ cargo --version
cargo 1.52.0 (69767412a 2021-04-21)
$ cargo build
    Updating crates.io index
  Downloaded proc-macro2 v1.0.29
  Downloaded serde_derive v1.0.130
  Downloaded serde v1.0.130
  Downloaded serde_json v1.0.68
  Downloaded libc v0.2.102
  Downloaded syn v1.0.76
  Downloaded neuroflow v0.1.3
  Downloaded memchr v2.4.1
  Downloaded itoa v0.4.8
  Downloaded 9 crates (1.2 MB) in 1.55s
   Compiling serde v1.0.130
   Compiling proc-macro2 v1.0.29
   Compiling memchr v2.4.1
   Compiling ryu v1.0.5
   Compiling libc v0.2.102
   Compiling unicode-xid v0.2.2
   Compiling syn v1.0.76
   Compiling itoa v0.4.8
   Compiling regex-automata v0.1.10
   Compiling serde_derive v1.0.130
   Compiling serde_json v1.0.68
   Compiling lazy_static v1.4.0
   Compiling byteorder v1.4.3
   Compiling quote v1.0.9
   Compiling csv-core v0.1.10
   Compiling rand v0.4.6
   Compiling rand v0.3.23
   Compiling bstr v0.2.16
   Compiling bincode v0.9.2
   Compiling csv v1.1.6
   Compiling neuroflow v0.1.3
   Compiling neuro v0.1.0 (/home/user/git/neuro)
error[E0277]: the trait bound `Result<DataSet, Box<dyn std::error::Error>>: Extractable` is not satisfied
  --> src/main.rs:23:16
   |
23 |         .train(&data, 20_000);
   |                ^^^^^ the trait `Extractable` is not implemented for `Result<DataSet, Box<dyn std::error::Error>>`

error[E0599]: no method named `len` found for enum `Result<DataSet, Box<dyn std::error::Error>>` in the current scope
  --> src/main.rs:27:22
   |
27 |     for i in 0..data.len(){
   |                      ^^^ method not found in `Result<DataSet, Box<dyn std::error::Error>>`

error[E0599]: no method named `get` found for enum `Result<DataSet, Box<dyn std::error::Error>>` in the current scope
  --> src/main.rs:28:28
   |
28 |         res = nn.calc(data.get(i).0)[0];
   |                            ^^^ method not found in `Result<DataSet, Box<dyn std::error::Error>>`

error[E0599]: no method named `get` found for enum `Result<DataSet, Box<dyn std::error::Error>>` in the current scope
  --> src/main.rs:29:18
   |
29 |         d = data.get(i);
   |                  ^^^ method not found in `Result<DataSet, Box<dyn std::error::Error>>`

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0277, E0599.
For more information about an error, try `rustc --explain E0277`.
error: could not compile `neuro`
To learn more, run the command again with --verbose.

and i used other NN.

[Bowarc]

The trait Extractable is implemented for DataSet but your data variable has type Result<DataSet, Box<dyn std::error::Error>>, if you use .unwrap() you'd get a DataSet or a runtime panic if your data variable was containing an error