array_tool

Array helpers for Rust. Some of the most common methods you would use on Arrays made available on Vectors. Polymorphic implementations for handling most of your use cases.

Installation

Add the following to your Cargo.toml file

[dependencies]
array_tool = "1.0.0"

And in your rust files where you plan to use it put this at the top

extern crate array_tool;

And if you plan to use all of the Vector helper methods available you may do

use array_tool::vec::*;

This crate has helpful methods for strings as well.

Iterator Usage

use array_tool::iter::ZipOpt;
fn zip_option<U: Iterator>(self, other: U) -> ZipOption<Self, U>
  where Self: Sized, U: IntoIterator;
  //  let a = vec![1];
  //  let b = vec![];
  //  a.zip_option(b).next()      // input
  //  Some((Some(1), None))       // return value

Vector Usage

pub fn uniques<T: PartialEq + Clone>(a: Vec<T>, b: Vec<T>) -> Vec<Vec<T>>
  //  array_tool::uniques(vec![1,2,3,4,5], vec![2,5,6,7,8]) // input
  //  vec![vec![1,3,4], vec![6,7,8]]                        // return value

use array_tool::vec::Uniq;
fn uniq(&self, other: Vec<T>) -> Vec<T>;
  //  vec![1,2,3,4,5,6].uniq( vec![1,2,5,7,9] ) // input
  //  vec![3,4,6]                               // return value
fn uniq_via<F: Fn(&T, &T) -> bool>(&self, other: Self, f: F) -> Self;
  //  vec![1,2,3,4,5,6].uniq_via( vec![1,2,5,7,9], |&l, r| l == r + 2 ) // input 
  //  vec![1,2,4,6]                                                     // return value
fn unique(&self) -> Vec<T>;
  //  vec![1,2,1,3,2,3,4,5,6].unique()          // input
  //  vec![1,2,3,4,5,6]                         // return value
fn unique_via<F: Fn(&T, &T) -> bool>(&self, f: F) -> Self;
  //  vec![1.0,2.0,1.4,3.3,2.1,3.5,4.6,5.2,6.2].
  //  unique_via( |l: &f64, r: &f64| l.floor() == r.floor() ) // input
  //  vec![1.0,2.0,3.3,4.6,5.2,6.2]                           // return value
fn is_unique(&self) -> bool;
  //  vec![1,2,1,3,4,3,4,5,6].is_unique()       // input
  //  false                                     // return value
  //  vec![1,2,3,4,5,6].is_unique()             // input
  //  true                                      // return value

use array_tool::vec::Shift;
fn unshift(&mut self, other: T);    // no return value, modifies &mut self directly
  //  let mut x = vec![1,2,3];
  //  x.unshift(0);
  //  assert_eq!(x, vec![0,1,2,3]);
fn shift(&mut self) -> Option<T>;
  //  let mut x = vec![0,1,2,3];
  //  assert_eq!(x.shift(), Some(0));
  //  assert_eq!(x, vec![1,2,3]);

use array_tool::vec::Intersect;
fn intersect(&self, other: Vec<T>) -> Vec<T>;
  //  vec![1,1,3,5].intersect(vec![1,2,3]) // input
  //  vec![1,3]                            // return value
fn intersect_if<F: Fn(&T, &T) -> bool>(&self, other: Vec<T>, validator: F) -> Vec<T>;
  //  vec!['a','a','c','e'].intersect_if(vec!['A','B','C'], |l, r| l.eq_ignore_ascii_case(r)) // input
  //  vec!['a','c']                                                                           // return value

use array_tool::vec::Join;
fn join(&self, joiner: &'static str) -> String;
  //  vec![1,2,3].join(",")                // input
  //  "1,2,3"                              // return value

use array_tool::vec::Times;
fn times(&self, qty: i32) -> Vec<T>;
  //  vec![1,2,3].times(3)                 // input
  //  vec![1,2,3,1,2,3,1,2,3]              // return value

use array_tool::vec::Union;
fn union(&self, other: Vec<T>) -> Vec<T>;
  //  vec!["a","b","c"].union(vec!["c","d","a"])   // input
  //  vec![ "a", "b", "c", "d" ]                   // return value

String Usage

use array_tool::string::ToGraphemeBytesIter;
fn grapheme_bytes_iter(&'a self) -> GraphemeBytesIter<'a>;
  //  let string = "a s—d féZ";
  //  let mut graphemes = string.grapheme_bytes_iter()
  //  graphemes.skip(3).next();            // input
  //  [226, 128, 148]                      // return value for emdash `—`

use array_tool::string::Squeeze;
fn squeeze(&self, targets: &'static str) -> String;
  //  "yellow moon".squeeze("")            // input
  //  "yelow mon"                          // return value
  //  "  now   is  the".squeeze(" ")       // input
  //  " now is the"                        // return value

use array_tool::string::Justify;
fn justify_line(&self, width: usize) -> String;
  //  "asd as df asd".justify_line(16)     // input
  //  "asd  as  df  asd"                   // return value
  //  "asd as df asd".justify_line(18)     // input
  //  "asd   as   df  asd"                 // return value

use array_tool::string::SubstMarks;
fn subst_marks(&self, marks: Vec<usize>, chr: &'static str) -> String;
  //  "asdf asdf asdf".subst_marks(vec![0,5,8], "Z") // input
  //  "Zsdf ZsdZ asdf"                               // return value

use array_tool::string::WordWrap;
fn word_wrap(&self, width: usize) -> String;
  //  "01234 67 9 BC EFG IJ".word_wrap(6)  // input
  //  "01234\n67 9\nBC\nEFG IJ"            // return value

use array_tool::string::AfterWhitespace;
fn seek_end_of_whitespace(&self, offset: usize) -> Option<usize>;
  //  "asdf           asdf asdf".seek_end_of_whitespace(6) // input
  //  Some(9)                                              // return value
  //  "asdf".seek_end_of_whitespace(3)                     // input
  //  Some(0)                                              // return value
  //  "asdf           ".seek_end_of_whitespace(6)          // input
  //  None                                                 // return_value

Future plans

Expect methods to become more polymorphic over time (same method implemented for similar & compatible types). I plan to implement many of the methods available for Arrays in higher languages; such as Ruby. Expect regular updates.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (MIT-LICENSE or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.