only rand remains

Author: AndyGauge

.gitignore

@@ -4,4 +4,5 @@ target/
 book/
 *.swp
 lines.txt
-.idea/
+.idea/
+.skeptic-cache

Cargo.toml

@@ -15,7 +15,7 @@ test-rand = []
 ansi_term = "0.11.0"
 approx = "0.3"
 base64 = "0.22.1"
-bitflags = "2.9.1"
+bitflags = "1.3.2"
 byteorder = "1.0"
 cc = "1.0"
 chrono = "0.4"
@@ -27,6 +27,7 @@ data-encoding = "2.1.0"
 env_logger = "0.11.3"
 flate2 = "1.0"
 glob = "0.3"
+image = "0.24"
 
 lazy_static = "1.0"
 log = "0.4"

src/concurrency/parallel/rayon-thumbnails.md

@@ -9,32 +9,22 @@ then saves them in a new folder called `thumbnails`.
 images in parallel using [`par_iter`] calling  [`DynamicImage::resize`].
 
 ```rust,edition2018,no_run
-# use error_chain::error_chain;
-
+use anyhow::Result;
 use std::path::Path;
 use std::fs::create_dir_all;
 
-# use error_chain::ChainedError;
 use glob::{glob_with, MatchOptions};
-use image::{FilterType, ImageError};
+use image::imageops::FilterType;
 use rayon::prelude::*;
 
-# error_chain! {
-#     foreign_links {
-#         Image(ImageError);
-#         Io(std::io::Error);
-#         Glob(glob::PatternError);
-#     }
-# }
-
 fn main() -> Result<()> {
     let options: MatchOptions = Default::default();
     let files: Vec<_> = glob_with("*.jpg", options)?
         .filter_map(|x| x.ok())
         .collect();
 
     if files.len() == 0 {
-        error_chain::bail!("No .jpg files found in current directory");
+        anyhow::bail!("No .jpg files found in current directory");
     }
 
     let thumb_dir = "thumbnails";
@@ -46,12 +36,12 @@ fn main() -> Result<()> {
         .par_iter()
         .map(|path| {
             make_thumbnail(path, thumb_dir, 300)
-                .map_err(|e| e.chain_err(|| path.display().to_string()))
+                .map_err(|e| anyhow::anyhow!("Failed to process {}: {}", path.display(), e))
         })
         .filter_map(|x| x.err())
         .collect();
 
-    image_failures.iter().for_each(|x| println!("{}", x.display_chain()));
+    image_failures.iter().for_each(|x| println!("{}", x));
 
     println!("{} thumbnails saved successfully", files.len() - image_failures.len());
     Ok(())

src/concurrency/thread/threadpool-fractal.md

@@ -17,20 +17,12 @@ Create [`ThreadPool`] with thread count equal to number of cores with [`num_cpus
 [`ImageBuffer::save`] writes the image to `output.png`.
 
 ```rust,edition2018,no_run
-# use error_chain::error_chain;
-use std::sync::mpsc::{channel, RecvError};
+use anyhow::Result;
+use std::sync::mpsc::channel;
 use threadpool::ThreadPool;
 use num::complex::Complex;
 use image::{ImageBuffer, Pixel, Rgb};
 #
-# error_chain! {
-#     foreign_links {
-#         MpscRecv(RecvError);
-#         Io(std::io::Error);
-#         Image(image::ImageError);
-#     }
-# }
-#
 # // Function converting intensity values to RGB
 # // Based on http://www.efg2.com/Lab/ScienceAndEngineering/Spectra.htm
 # fn wavelength_to_rgb(wavelength: u32) -> Rgb<u8> {