diff --git a/src/function.rs b/src/function.rs
index 9b0223b..a3c3af9 100644
--- a/src/function.rs
+++ b/src/function.rs
@@ -604,7 +604,6 @@ mod tests {
 			do_extrema: false,
 			do_roots: false,
 			plot_width: pixel_width,
-			..crate::egui_app::AppSettings::default()
 		}
 	}
 
diff --git a/src/hashmap_helper.rs b/src/hashmap_helper.rs
index 7239f8a..df1d6a5 100644
--- a/src/hashmap_helper.rs
+++ b/src/hashmap_helper.rs
@@ -5,14 +5,12 @@ pub fn compile_hashmap(data: Vec<String>) -> Vec<(String, String)> {
 	let start = std::time::Instant::now();
 	println!("compile_hashmap");
 
-	let functions_processed: Vec<String> = data.iter().map(|e| e.to_string() + "(").collect();
-
 	let mut seen = HashSet::new();
 
-	let tuple_list_1: Vec<(String, String)> = functions_processed
-		.into_iter()
-		.map(|func| all_possible_splits(func, &mut seen))
-		.flatten()
+	let tuple_list_1: Vec<(String, String)> = data
+		.iter()
+		.map(|e| e.to_string() + "(")
+		.flat_map(|func| all_possible_splits(func, &mut seen))
 		.collect();
 
 	let keys: Vec<&String> = tuple_list_1.iter().map(|(a, _)| a).collect();
@@ -48,22 +46,20 @@ pub fn compile_hashmap(data: Vec<String>) -> Vec<(String, String)> {
 fn all_possible_splits(
 	func: String, seen: &mut HashSet<(String, String)>,
 ) -> Vec<(String, String)> {
-	return (1..func.len())
+	(1..func.len())
 		.map(|i| {
 			let (first, last) = func.split_at(i);
-			return (first.to_string(), last.to_string());
+			(first.to_string(), last.to_string())
 		})
-		.map(|(first, last)| {
+		.flat_map(|(first, last)| {
 			if seen.contains(&(first.clone(), last.clone())) {
 				return None;
 			}
 			seen.insert((first.to_string(), last.to_string()));
 
-			return Some((first.to_string(), last.to_string()));
+			Some((first, last))
 		})
-		.filter(|a| a.is_some())
-		.map(|a| a.unwrap())
-		.collect::<Vec<(String, String)>>();
+		.collect::<Vec<(String, String)>>()
 }
 
 #[cfg(test)]
diff --git a/src/misc.rs b/src/misc.rs
index 1a58dff..1cef17a 100644
--- a/src/misc.rs
+++ b/src/misc.rs
@@ -6,7 +6,7 @@ use serde_json::Value as JsonValue;
 use rayon::prelude::*;
 
 #[cfg(not(threading))]
-pub fn dyn_iter<'a, T>(input: &'a Vec<T>) -> impl Iterator<Item = &'a T>
+pub fn dyn_iter<'a, T>(input: &'a [T]) -> impl Iterator<Item = &'a T>
 where
 	&'a [T]: IntoIterator,
 {
@@ -22,7 +22,7 @@ where
 }
 
 #[cfg(not(threading))]
-pub fn dyn_mut_iter<'a, T>(input: &'a mut Vec<T>) -> impl Iterator<Item = &'a mut T>
+pub fn dyn_mut_iter<'a, T>(input: &'a mut [T]) -> impl Iterator<Item = &'a mut T>
 where
 	&'a mut [T]: IntoIterator,
 {
@@ -252,7 +252,7 @@ pub fn decimal_round(x: f64, n: usize) -> f64 {
 /// `f_1` is f'(x) aka the derivative of f(x)
 /// The function returns a Vector of `x` values where roots occur
 pub fn newtons_method_helper(
-	threshold: &f64, range: &std::ops::Range<f64>, data: &Vec<EguiValue>, f: &dyn Fn(f64) -> f64,
+	threshold: &f64, range: &std::ops::Range<f64>, data: &[EguiValue], f: &dyn Fn(f64) -> f64,
 	f_1: &dyn Fn(f64) -> f64,
 ) -> Vec<f64> {
 	data.iter()
@@ -277,7 +277,7 @@ fn newtons_method(
 	let mut x2: f64;
 	let mut fail: bool = false;
 	loop {
-		x2 = &x1 - (f(x1) / f_1(x1));
+		x2 = x1 - (f(x1) / f_1(x1));
 		if !range.contains(&x2) {
 			fail = true;
 			break;
diff --git a/src/suggestions.rs b/src/suggestions.rs
index e76e575..8569484 100644
--- a/src/suggestions.rs
+++ b/src/suggestions.rs
@@ -64,12 +64,7 @@ impl HintEnum<'static> {
 		}
 	}
 
-	pub fn is_multi(&self) -> bool {
-		match self {
-			HintEnum::Many(_) => true,
-			_ => false,
-		}
-	}
+	pub fn is_multi(&self) -> bool { matches!(self, HintEnum::Many(_)) }
 
 	pub fn ensure_many(&self) -> &[&str] {
 		match self {
@@ -77,12 +72,7 @@ impl HintEnum<'static> {
 			_ => panic!("ensure_many called on non-Many value"),
 		}
 	}
-	pub fn is_some(&self) -> bool {
-		match self {
-			HintEnum::None => false,
-			_ => true,
-		}
-	}
+	pub fn is_some(&self) -> bool { !matches!(self, HintEnum::None) }
 
 	pub fn is_none(&self) -> bool { !self.is_some() }