Merge pull request rust-lang#356 from markgoddard/issues/355

Fix Read encoder examples

src/deflate/read.rs

@@ -25,11 +25,11 @@ use crate::bufreader::BufReader;
 /// #
 /// // Return a vector containing the Deflate compressed version of hello world
 /// fn deflateencoder_read_hello_world() -> io::Result<Vec<u8>> {
-///    let mut ret_vec = [0;100];
+///    let mut ret_vec = Vec::new();
 ///    let c = b"hello world";
 ///    let mut deflater = DeflateEncoder::new(&c[..], Compression::fast());
-///    let count = deflater.read(&mut ret_vec)?;
-///    Ok(ret_vec[0..count].to_vec())
+///    deflater.read_to_end(&mut ret_vec)?;
+///    Ok(ret_vec)
 /// }
 /// ```
 #[derive(Debug)]

src/gz/read.rs

@@ -25,11 +25,11 @@ use crate::Compression;
 /// // Return a vector containing the GZ compressed version of hello world
 ///
 /// fn gzencode_hello_world() -> io::Result<Vec<u8>> {
-///     let mut ret_vec = [0;100];
+///     let mut ret_vec = Vec::new();
 ///     let bytestring = b"hello world";
 ///     let mut gz = GzEncoder::new(&bytestring[..], Compression::fast());
-///     let count = gz.read(&mut ret_vec)?;
-///     Ok(ret_vec[0..count].to_vec())
+///     gz.read_to_end(&mut ret_vec)?;
+///     Ok(ret_vec)
 /// }
 /// ```
 #[derive(Debug)]

src/zlib/read.rs

@@ -24,9 +24,9 @@ use crate::bufreader::BufReader;
 /// # fn open_hello_world() -> std::io::Result<Vec<u8>> {
 /// let f = File::open("examples/hello_world.txt")?;
 /// let mut z = ZlibEncoder::new(f, Compression::fast());
-/// let mut buffer = [0;50];
-/// let byte_count = z.read(&mut buffer)?;
-/// # Ok(buffer[0..byte_count].to_vec())
+/// let mut buffer = Vec::new();
+/// z.read_to_end(&mut buffer)?;
+/// # Ok(buffer)
 /// # }
 /// ```
 #[derive(Debug)]