Remove panic by overflow possibility

NicolasKlenert · okaneco · web-flow · commit 3a7dbc928b84 · 2021-03-21T23:13:42.000+01:00
Co-authored-by: Collyn O'Kane &lt;47607823+okaneco@users.noreply.github.com&gt;
diff --git a/palette/src/gradient/mod.rs b/palette/src/gradient/mod.rs
@@ -28,7 +28,11 @@ pub trait ArrayLike : Index<usize>{
     }
     /// Returns a pointer to the last element of the collection, or None if it is empty.
     fn last(&self) -> Option<&Self::Output> {
-        self.get(self.len() - 1)
+        if !self.is_empty() {
+            self.get(self.len() - 1)
+        } else {
+            None
+        }
     }
     /// Returns true if the collection contains no elements.
     fn is_empty(&self) -> bool {

Original file line number	Diff line number	Diff line change
`@@ -28,7 +28,11 @@ pub trait ArrayLike : Index<usize>{`
`28`	`28`	`}`
`29`	`29`	`/// Returns a pointer to the last element of the collection, or None if it is empty.`
`30`	`30`	`fn last(&self) -> Option<&Self::Output> {`
`31`		`- self.get(self.len() - 1)`
	`31`	`+ if !self.is_empty() {`
	`32`	`+ self.get(self.len() - 1)`
	`33`	`+ } else {`
	`34`	`+ None`
	`35`	`+ }`
`32`	`36`	`}`
`33`	`37`	`/// Returns true if the collection contains no elements.`
`34`	`38`	`fn is_empty(&self) -> bool {`