You now have a good understanding of iterators and closures and how they can be used to process collections of data.
In this challenge, you will use iterators to filter out duplicate items from a collection of potentially redundant entries.
Define a function that takes a collection of items (as an iterator) and returns a collection of unique items in sorted order. The items are represented as strings. You are expected to handle duplicates and ignore entries that are empty or consist solely of whitespace.
Your function signature and return types must be determined by you, but the input must implement the Iterator
trait, ensuring flexibility for different iterator sources.
String
, &String
, or &str
items.fn unique_items<I, T>(items: I) -> Vec<String>
where
I: Iterator<Item = T>,
T: AsRef<str>,
{
// Your code here
}
HashSet
to track unique items.filter_map
method to remove invalid entries (e.g., empty or whitespace-only strings).trim
method on strings to handle whitespace effectively.HashSet
provides a method inesert
that returns a bool
indicating whether the item was already present.Vec
and call the sort
method.use std::{ collections::HashMap, hash::Hash };// 1. Finish the functionpub fn unique_items<T>(input: impl Iterator<Item = T>) -> Vec<String> where T: Clone + Hash + Eq + ToString + std::cmp::Ord{ let mut new_hash = HashMap::new(); for string in input { let to_string: String = string.to_string().trim().to_string(); if to_string.contains("\n") || to_string.contains("\t") || to_string.is_empty() { continue; } if !new_hash.contains_key(&to_string) { new_hash.insert(to_string, 1); } } let mut unique_vec: Vec<_> = new_hash.keys().cloned().collect(); unique_vec.sort(); unique_vec}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string() ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I, T>(iter: I) -> Vec<String> where I: Iterator<Item = T>, T: AsRef<str> { let mut filtered = iter.filter_map(|item| { // Use HashSet to track unique items as hints suggested let mut unique = HashSet::new(); let trimmed = item.as_ref().trim(); if !trimmed.is_empty() && unique.insert(trimmed) { Some(trimmed.to_string()) } else { None } }).collect::<Vec<String>>(); filtered.sort(); filtered.dedup(); filtered}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I, T>(iter: I) -> Vec<String> where I: Iterator<Item = T>, T: AsRef<str> { let mut filtered = iter.filter_map(|item| { let trimmed = item.as_ref().trim(); if trimmed.is_empty() { None } else { Some(trimmed.to_string()) } }).collect::<Vec<String>>(); // Since dedup removes consecutive repeated elements in the vector // so sort should be done before dedup filtered.sort(); filtered.dedup(); filtered}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::cmp::Ord;use std::cmp::PartialEq; pub fn unique_items<T: AsRef<str>+ Ord + PartialEq>(iter: impl Iterator<Item = T>) -> Vec<String> { let mut res = iter.filter(|x|{ !x.as_ref().is_empty() && !x.as_ref().trim().is_empty() }). map(|x| x.as_ref().trim().to_string() ) .collect::<Vec<String>>(); res.sort(); res.dedup(); res }/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use core::convert::AsRef;pub fn unique_items<'a, T>(mass: impl Iterator<Item = T>) -> Vec<String>where T: AsRef<str>,{ let mut item = mass .map(|x| x.as_ref().trim().to_string()) .filter(|x| x.len() != 0) .collect::<Vec<String>>(); item.sort(); item.dedup(); item}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>, I: Iterator<Item = T>>(iter: I) -> Vec<String> { let mut items: Vec<String> = iter .filter_map(|s| { let trimmed = s.as_ref().trim(); if trimmed.is_empty() { None } else { Some(trimmed.to_string()) } }) .collect(); items.sort_unstable(); items.dedup(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>, I:Iterator<Item=T>>(iter: I) -> Vec<String> { let mut iter: Vec<String> = iter.map(|s| s.as_ref().trim().to_string()) .filter(|s| !s.is_empty()) .collect::<Vec<_>>(); iter.sort(); iter.dedup(); iter}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I, T>(items: I) -> Vec<String>where T: AsRef<str>, I: Iterator<Item = T>,{ let mut items = items .filter_map(|item| { let trimmed = item.as_ref().trim(); match trimmed.is_empty() { true => None, false => Some(String::from(trimmed)), } }) .collect::<HashSet<_>>() .into_iter() .collect::<Vec<_>>(); items.sort(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut v = items.filter_map(|item| { let trimmed = item.as_ref().trim(); match trimmed.is_empty() { true => None, false => Some(String::from(trimmed)) } }).collect::<HashSet<_>>().into_iter().collect::<Vec<_>>(); v.sort(); v }/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut v = items.filter_map(|item| { let trimmed = item.as_ref().trim(); match trimmed.is_empty() { true => None, false => Some(String::from(trimmed)) } }).collect::<HashSet<_>>().into_iter().collect::<Vec<_>>(); v.sort(); v }/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the function// pub fn unique_items ...pub fn unique_items<'a, T: AsRef<str>>(it: impl Iterator<Item=T>) -> Vec<String>{ let s = it.into_iter() .filter_map(|x| match String::from(x.as_ref()).trim(){ "" => None, u => Some(String::from(u)) }) .collect::<HashSet<_>>(); let mut v = s.iter().cloned().collect::<Vec<_>>(); v.sort(); v}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(iter: I) -> Vec<String>where I: Iterator<Item=T>, T: AsRef<str>,{ let mut seen = HashSet::new(); let mut items = iter.filter_map(|v| { let tv = v.as_ref().trim(); if tv.is_empty() || !seen.insert(tv.to_string()) { None } else { Some(tv.to_string()) } }).collect::<Vec<String>>(); items.sort(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...use std::collections::HashSet;pub fn unique_items<I, T>(iter: I) -> Vec<String> where I: Iterator<Item=T>, T: AsRef<str>,{ let mut seen = HashSet::new(); let mut unique = iter .filter_map(|v| { let tv = v.as_ref().trim(); if tv.is_empty() || !seen.insert(tv.to_string()) { return None; } Some(tv.to_string()) }) .collect::<Vec<String>>(); unique.sort(); unique}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>, I: Iterator<Item = T>>(items: I) -> Vec<String> { let mut u_items: Vec<String> = items .map(|s| s.as_ref().trim().to_string()) .filter(|s| !s.is_empty()) .collect(); u_items.sort(); u_items.dedup(); u_items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionuse std::collections::HashSet;pub fn unique_items<T>(iter: impl Iterator<Item = T>) -> Vec<String>where T: AsRef<str>,{ let mut vec: Vec<_> = HashSet::<String>::from_iter(iter.filter_map(|item| { if !item.as_ref().chars().all(|char| char.is_whitespace()) { Some(item.as_ref().trim().to_string()) } else { None } })) .into_iter() .collect(); vec.sort(); vec}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;pub fn unique_items<I, T>(product_ids: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut seen = HashSet::new(); let mut unique_ids = product_ids .filter_map(|id| { let trimmed = id.as_ref().trim(); if !trimmed.is_empty() && seen.insert(trimmed.to_string()) { Some(trimmed.to_string()) } else { None } }) .collect::<Vec<String>>(); unique_ids.sort(); unique_ids}pub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I, T> (iter: I) -> Vec<String>where I: Iterator<Item=T>, T: AsRef<str>,{ let mut vector_clean: Vec<String> = iter.map(|s| s.as_ref().trim().to_string()).filter(|s| !s.is_empty()).collect(); vector_clean.sort(); vector_clean.dedup(); vector_clean}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
pub fn unique_items<T: AsRef<str>, I: Iterator<Item = T>>(items: I) -> Vec<String> { let mut items_filtered = items .filter_map(|item| { let trimed_str = item.as_ref().trim(); if !trimed_str.is_empty() { Some(trimed_str.to_string()) } else { None } }) .collect::<Vec<String>>(); items_filtered.sort(); items_filtered.dedup(); items_filtered}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut seen = HashSet::new(); let mut result = Vec::new(); for item in items { let s = item.as_ref().trim().to_string(); if s.is_empty() { continue; } if seen.insert(s.clone()) { result.push(s); } } result.sort(); result}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut seen_items: HashSet<String> = HashSet::new(); let mut filtered_items: Vec<String> = items .filter_map(|item| { let trimmed_str = item.as_ref().trim(); if trimmed_str.is_empty() { None } else { Some(trimmed_str.to_string()) } }) .filter(|s| seen_items.insert(s.clone())) .collect(); filtered_items.sort(); filtered_items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I>(iter: I) -> Vec<String> where I: Iterator, I::Item: AsRef<str>,{ let mut seen = HashSet::new(); let mut item = iter .map(|x| x.as_ref().trim().to_string()) .filter_map(|x| seen.insert(x.clone()).then(|| x)) .filter(|x| x.len() != 0) .collect::<Vec<String>>(); item.sort(); item}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I>(iter: I) -> Vec<String> where I: Iterator, I::Item: AsRef<str>,{ let mut seen = HashSet::new(); let mut item: Vec<String> = iter .map(|x| x.as_ref().trim().to_string()) .filter_map(|x| seen.insert(x.clone()).then(|| x)) .filter(|x| x.len() != 0) .collect(); item.sort(); item}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut seen = HashSet::new(); let mut result: Vec<String> = items .filter_map(|item| { let s = item.as_ref().trim(); if s.is_empty() { return None; } if seen.insert(s.to_string()) { Some(s.to_string()) } else { None } }) .collect(); result.sort(); result}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::BTreeSet;// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I, T>(iterator: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ BTreeSet::from_iter( iterator .map(|s| s.as_ref().trim().to_string()) .filter(|x| !x.is_empty()), ) .into_iter() .collect()}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::BTreeSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ BTreeSet::from_iter( items .map(|x| x.as_ref().trim().to_string()) .filter(|x| !x.is_empty()), ) .into_iter() .collect()}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::BTreeSet;pub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ BTreeSet::from_iter( items .map(|x| x.as_ref().trim().to_string()) .filter(|x| !x.is_empty()), ) .into_iter() .collect()}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::BTreeSet;pub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ BTreeSet::from_iter( items .map(|x| x.as_ref().trim().to_string()) .filter(|x| !x.is_empty()), ) .iter() .cloned() .collect()}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<I>(iter: I) -> Vec<String>where I: Iterator, I::Item: AsRef<str>,{ let mut found = Vec::with_capacity(iter.size_hint().0); iter.for_each(|item| { let trimmed = item.as_ref().trim().to_string(); if !(trimmed.len() == 0 || found.contains(&trimmed)) { found.push(trimmed); } }); found.sort(); found}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<I>(iter: I) -> Vec<String>where I: Iterator, I::Item: AsRef<str>,{ let mut found = Vec::with_capacity(iter.size_hint().0); iter.for_each(|item| { let trimmed = item.as_ref().trim().to_string(); let is_empty = trimmed.len() == 0; let is_duplicate = found.contains(&trimmed); if !(is_empty || is_duplicate) { found.push(trimmed); } }); found.sort(); found}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<I>(iter: I) -> Vec<String>where I: Iterator, I::Item: AsRef<str>,{ let mut found = Vec::with_capacity(iter.size_hint().0); iter.for_each(|item| { let trimmed = item.as_ref().trim(); let is_empty = trimmed.len() == 0; let is_duplicate = found.contains(&trimmed.to_string()); if !(is_empty || is_duplicate) { found.push(trimmed.to_string()); } }); found.sort(); found}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<I>(iter: I) -> Vec<String>where I: Iterator, I::Item: AsRef<str>,{ let mut found = vec![]; iter.for_each(|item| { let trimmed = item.as_ref().trim(); let is_empty = trimmed.len() == 0; let is_duplicate = found.contains(&trimmed.to_string()); if !(is_empty || is_duplicate) { found.push(trimmed.to_string()); } }); found.sort(); found}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<I>(iter: I) -> Vec<String>where I: Iterator, I::Item: AsRef<str>,{ let mut found = Vec::with_capacity(iter.size_hint().0); iter.for_each(|item| { let trimmed = item.as_ref().trim(); let is_empty = trimmed.len() == 0; let is_duplicate = found.contains(&trimmed.to_string()); if !(is_empty || is_duplicate) { found.push(trimmed.to_string()); } }); found.sort(); found}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
use std::collections::HashSet;// 1. Finish the functionpub fn unique_items(iter: impl Iterator<Item = impl AsRef<str>>) -> Vec<String> { let mut seen = HashSet::new(); for i in iter { let i = i.as_ref().trim(); if i.is_empty() { continue } if !seen.contains(i) { seen.insert(i.to_string()); } }; let mut res: Vec<String> = seen.into_iter().collect(); res.sort(); res}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let mut items: Vec<String> = items.filter_map(|x| match x.as_ref().trim() { "" => None, val => Some(val.to_string()) }).collect(); items.sort(); items.dedup(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<I: Iterator<Item = T>, T: AsRef<str>>(iter: I) -> Vec<String> { let mut result: Vec<String> = vec![]; iter.for_each(|val| if !result.contains(&val.as_ref().trim().to_string()) && val.as_ref().to_string().trim() != "" {result.push(val.as_ref().trim().to_string());}); result.sort(); result}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>>(iter: impl Iterator<Item = T>) -> Vec<String> { let mut items: Vec<String> = iter .filter_map(|item| { let trimmed = item.as_ref().trim(); if trimmed.is_empty() { None } else { Some(trimmed.to_string()) } }) .collect(); items.sort_unstable(); items.dedup(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<T: AsRef<str>>(iter: impl Iterator<Item=T>) -> Vec<String> { let mut v = iter.map(|s| s.as_ref().trim().to_string()).filter(|s| *s != "").collect::<Vec<_>>(); v.sort(); v.dedup(); v}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>>(iter: impl Iterator<Item=T>) -> Vec<String> { let mut v = iter.map(|s| s.as_ref().trim().to_string()).filter(|s| *s != "").collect::<Vec<_>>(); v.sort(); v.dedup(); v}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>>(iter: impl Iterator<Item = T>) -> Vec<String> { let mut list = iter .map(|s| s.as_ref().trim().to_string()) .filter(|s| !s.is_empty()) .collect::<Vec<String>>(); list.sort(); list.chunk_by(|a, b| a == b).map(|a| a[0].clone()).collect()}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T: AsRef<str>>(items: impl Iterator<Item = T>) -> Vec<String> { let mut items = items .filter_map(|s| Some(s.as_ref().trim().to_string()).filter(|s| !s.is_empty())) .collect::<Vec<String>>(); items.sort(); items.dedup(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<T: AsRef<str>>(items: impl Iterator<Item = T>) -> Vec<String> { let mut items = items .into_iter() .map(|s| s.as_ref().trim().to_string()) .filter(|s| !s.is_empty()) .collect::<Vec<String>>(); items.sort(); items.dedup(); items}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionuse std::collections::HashSet;pub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ // add code here let mut hs = HashSet::new(); for item in items { let trimmed = item.as_ref().trim(); if !trimmed.is_empty() { hs.insert(trimmed.to_string()); } } let mut v: Vec<String> = hs.into_iter().collect(); v.sort(); v}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the function// pub fn unique_items ...pub fn unique_items<U>(iter: impl Iterator<Item = U>) -> Vec<String>where U: AsRef<str>,{ let mut my_vec = iter .map(|a| a.as_ref().trim().to_string()) .filter( |a| !a.is_empty() ) .collect::<Vec<String>>(); my_vec.sort(); my_vec.dedup(); my_vec}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
//use std::collections::HashSet;// 1. Finish the functionpub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: std::convert::AsRef<str> { //let mut known_values: HashSet<String> = HashSet::new(); let mut result = items.map(|x| x.as_ref().trim().to_string()).filter(|x| !x.is_empty()).collect::<Vec<String>>(); result.sort(); result.dedup(); result}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
/// Example usagepub fn unique_items<T>(iter : impl Iterator<Item = T>) -> Vec<String> where T : AsRef<str>,{ let mut v = iter .map(|e| e.as_ref().trim().to_string()) .filter(|e| !e.is_empty()) .collect::<Vec<_>>(); v.sort(); v.dedup(); return v;}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<T>(iter : impl Iterator<Item = T>) -> Vec<String> where T : AsRef<str>,{ let mut v = iter .map(|e| e.as_ref().trim().to_string()) .filter(|e| !e.is_empty()) .collect::<Vec<_>>(); v.sort(); v.dedup(); return v;}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionuse std::collections::HashSet;pub fn unique_items<I, T>(items: I) -> Vec<String>where I: Iterator<Item = T>, T: AsRef<str>,{ let unique = items .map(|s| s.as_ref().trim().to_owned()) .filter(|s| !s.is_empty()) .collect::<HashSet<String>>(); let mut sorted = Vec::from_iter(unique.into_iter()); sorted.sort(); sorted // let mut all = items // .map(|s| s.as_ref().trim().to_owned()) // .filter(|s| !s.is_empty()) // .collect::<Vec<String>>(); // all.sort(); // all.dedup(); // all}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<S>(input: impl Iterator<Item = S>) -> Vec<String>where S : AsRef<str>{ let mut st = input.map(|s| s.as_ref().trim().to_owned()) .filter(|s| !s.is_empty()) .collect::<Vec<String>>(); st.sort(); st.dedup(); st}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
pub fn unique_items<S>(iter : impl Iterator<Item = S>) -> Vec<String> where S : AsRef<str> { let mut st = iter.map(|s| s.as_ref().trim().to_owned()) .filter(|s| !s.is_empty()) .collect::<Vec<String>>(); st.sort(); st.dedup(); st}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}
// 1. Finish the functionpub fn unique_items<'a, S>(iter: impl Iterator<Item = S>) -> Vec<String>where S: AsRef<str> { let mut strs: Vec<String> = iter .map(|st| st.as_ref().trim().to_owned()) .filter(|st| !st.is_empty()) .collect(); strs.sort_unstable(); strs.dedup(); strs}/// Example usagepub fn main() { let product_ids = vec![ "abc123".to_string(), " ".to_string(), "def456".to_string(), "abc123".to_string(), "ghi789".to_string(), "ghi789".to_string(), " def456".to_string(), ]; let unique_ids = unique_items(product_ids.into_iter()); assert_eq!(unique_ids, vec!["abc123", "def456", "ghi789"]);}