william-ranges 0.1.0

hi this is william tst project
Documentation 
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pub fn main(){
    let mut v = "hello".into();
    let a :&String = &v;
    let aa = &v;
    println!("v lengh:{}:{:?}",v.len(),v.as_ptr());
    println!("aa lengh:{}:{:?}",aa.len(),aa.as_ptr());
    // let b :&String =&v;
    println!("v lengh:{}",a.len());
    let c:&mut String = &mut v;
    println!("c(v) lengh:{},{:?}",c.len(),c.as_ptr());

    c.push_str(",world");
    println!("v appened:{}",c);
    v.push_str(",world");
    println!("v lengh:{}",v.len());
    let cc = longest("abc".into(), "bb".into());
    println!("the longer one is : {}",cc);

}

fn longest<'a,'b,'c>(x:&'a str,y:&'b str) ->&'c str
where 'a:'c, 'b:'c {
  if x.len() > y.len(){
    x
  }else {
    y
  }
}