Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

In [ ]:

:timing
:sccache 1

Tips and Traps¶

A slice is a dynamically-sized view into a contiguous sequence. It is basically a fat pointer which consists of a pointer and a length. For this reason, a slice has a len method. As a matter of fact, many methods of array and Vec are implemented via slice.

In [6]:

let v = vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9];

In [13]:

&v[2..7]

Out[13]:

[2, 3, 4, 5, 6]

In [14]:

&v[2..]

Out[14]:

[2, 3, 4, 5, 6, 7, 8, 9]

In [16]:

&v[..4]

Out[16]:

[0, 1, 2, 3]

Nested Slices¶

Slices in Rust can be nested. That is, you can get (sub) slice out of a slice.

In [21]:

&v[2..7][1..3]

Out[21]:

[3, 4]

In [9]:

&v[2..7].binary_search(&8)

Out[9]:

Err(5)

In [10]:

&v[2..7].binary_search(&4)

Out[10]:

Ok(2)

In [ ]: