binary search

use std::cmp::Ordering;

fn binary_search<T: Ord>(arr: &[T], desired: &T) -> Option<usize> {
    let mut low = 0;
    let mut high = arr.len() - 1;

    while low <= high {
        let mid= (low + high) / 2;

        match arr[mid].cmp(key) {
            Ordering::Less=> low= mid + 1,
            Ordering::Greater=> high= mid - 1,
            Ordering::Equal=> return Some(mid),
        }
    }
    None
}

h1

h2

h3

emphasis

this text will be italic
this will also be italic

this text will be bold
this will also be bold

you can combine them

lists

unordered

• item 1
• item 2
• item 2a
• item 2b
  • item 3a
  • item 3b

ordered

1. item 1
2. item 2
3. item 3
   1. item 3a
   2. item 3b

links

find the source here github/vimfn/www

blockquotes

markdown is a lightweight markup language with plain-text-formatting syntax, created in 2004 by john gruber with aaron swartz.

markdown is often used to format readme files, for writing messages in online discussion forums, and to create rich text using a plain text editor.