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Commit b29efcd

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reviewing rust
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7 files changed

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7 files changed

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‎.gitignore

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/target

‎Cargo.lock

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‎Cargo.toml

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[package]
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name = "example"
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version = "0.1.0"
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edition = "2018"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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borsh = "0.9.1"
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borsh-derive = "0.9.1"

‎src/main.rs

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‎src/main1.rs

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use borsh::{BorshDeserialize, BorshSerialize};
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#[derive(BorshSerialize, BorshDeserialize, Debug)]
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pub struct Record {
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pub nft_address: String, // < 50
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pub owner: String, // < 50
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pub register_date: String // < 50
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}
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fn main() {
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/*
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const RECORD_MAX_SIZE: usize = 44 + 44 + 12 + 4 * 3;
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let mut account_info: Vec<u8> = Vec::new();
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let data1 = String::from("4h8pBJZDp4MSzXH675AgCSMCnxEDZnjkG5DW31ySCdyp");
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let data2 = String::from("Ch4vjb7joSG3RTQc24Z91VJyQXN5WqncvXoXpHEhqEoX");
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let data1_bytes: &[u8] = data1.as_bytes();
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let new_owner_address = String::from("Ch4vjb7joSG3RTQc24Z91VJyQXN5WqncvXoXpHEhqEoX");
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let new_nft_address = String::from_utf8(data1_bytes.to_vec()).unwrap();
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let new_record: Record = Record {
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nft_address: new_nft_address,
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owner: new_owner_address,
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register_date: String::from("ABCABCABCABC")
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};
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let mut buffer: Vec<u8> = Vec::new();
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new_record.serialize(&mut buffer).unwrap();
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account_info.append(&mut buffer);
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new_record.serialize(&mut buffer).unwrap();
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account_info.append(&mut buffer);
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println!("{:?}", account_info);
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let dst: Vec<Vec<u8>> = account_info.chunks(RECORD_MAX_SIZE).map(|s| s.into()).collect();
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println!("{} {}", dst.len(), account_info.len());
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let one_record : Record = Record::try_from_slice(dst[0].as_slice()).unwrap();
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println!("{:?}", one_record);
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let data: [u8; 5] = [4, 6, 7, 4, 3];
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let mut data_vec: Vec<u8> = vec![];
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data_vec.append(&mut data.to_vec());
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data_vec.append(&mut account_info);
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println!("{:?}", data_vec);
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*/
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//let bytes: Vec<u8> = nftAddress.to_vec();
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//let ascii: Ascii = Ascii::from_bytes(bytes).unwrap();
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//println!("{:?}", nftAddress.to_vec());
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//let addr = String::from_utf8(nftAddress.to_vec()).unwrap();
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//println!("{}", addr);
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// let ascii: Ascii = Ascii::from_bytes(bytes).unwrap(); // We know these chosen bytes are ok. // This call is zero-cost: no allocation, copies, or scans.
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// let string = String::from(ascii);
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}
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‎src/main2.rs

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trait Show {
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fn show(&self) -> String;
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}
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impl Show for i32 {
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fn show(&self) -> String {
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format!("four-byte signed {}", self)
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}
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}
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impl Show for f64 {
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fn show(&self) -> String {
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format!("eight byte float {}", self)
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}
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}
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fn main() {
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let answer = 42;
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let pi = 3.14;
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println!("{}", answer.show());
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println!("{}", pi.show());
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}

‎src/person.rs

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use std::fmt;
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struct Person {
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first_name: String,
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last_name: String
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}
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impl fmt::Debug for Person {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "I am {}!", self.full_name())
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}
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}
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impl Person {
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fn new(first: &str, last: &str) -> Self {
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Person {
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first_name: first.to_string(),
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last_name: last.to_string()
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}
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}
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fn full_name(&self) -> String {
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format!("{} {}", self.first_name, self.last_name)
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}
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fn copy(&self) -> Self {
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Self::new(&self.first_name, &self.last_name)
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}
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fn set_first_name(&mut self, first: &str) {
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self.first_name = first.to_string();
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}
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fn to_touple(self) -> (String, String) {
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(self.first_name, self.last_name)
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}
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}
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fn main() {
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let mut p = Person::new("john", "max");
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println!("{:?}", p);
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println!("{} {}", p.first_name, p.last_name);
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let c = p.copy();
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println!("c is {:?}", c);
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p.first_name = "asdfasdf".to_string();
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println!("c is {:?}", c);
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println!("p is {:?}", p);
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let x = "asdfasdf";
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let y = x.to_string();
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println!("x is {}", x);
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println!("{:?}", p.to_touple());
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}
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