User:Inthar/Code: Difference between revisions

@@ Line 653: / Line 653: @@
 use std::cmp::{min, max};
-type JIScaleProperty = fn(s: [r64]) -> bool;
-type CentsScaleProperty = fn(s: [f64]) -> bool;
-type AbstractScaleProperty = fn(s: &str) -> bool;
 type EquivalenceRelation<T> = fn(&T, &T) -> bool;
+// Treating `scale` as a cyclic string (that is, "scale[i] == scale[i % scale.len()]"),
+// take a slice of length `slice_length` from `basepoint`; assumes `slice_length` <= `scale`.len()
+fn slice_cyclic_string(scale: &str, basepoint: usize, slice_length: usize) -> String {
+	let arr = scale;
+	if basepoint + slice_length < scale.len() {
+		return String::from(&arr[basepoint..(basepoint+slice_length)]);
+	} else {
+		let mut ret = String::new();
+		ret.push_str(&arr[basepoint..]);
+		ret.push_str(&arr[..(basepoint + slice_length - scale.len())]);
+		return ret;
+	}
+}
 pub fn are_rotationally_equivalent(scale1: &String, scale2: &String)-> bool{