version 0.1.26

CHANGELOG.md

@@ -13,6 +13,12 @@
 **Note**: Gaps between patch versions are faulty/broken releases.
 **Note**: A feature tagged as Experimental is in a high state of flux, you're at risk of it changing without notice.
 
+# 0.1.26
+
+- **New Feature**
+  - `Zipper`
+    - add `moveByFindFirst`, #81 (@SRachamim)
+
 # 0.1.25
 
 - **New Feature**

docs/modules/Zipper.ts.md

@@ -348,7 +348,7 @@ no element matches, `None` is returned. If an element matches,
 export declare const moveByFindFirst: <A>(predicate: Predicate<A>) => (fa: Zipper<A>) => O.Option<Zipper<A>>
 ```
 
-Added in v0.1.25
+Added in v0.1.26
 
 ## start
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "fp-ts-contrib",
-  "version": "0.1.25",
+  "version": "0.1.26",
   "description": "A community driven utility package for fp-ts",
   "main": "lib/index.js",
   "module": "es6/index.js",

src/Zipper.ts

@@ -207,7 +207,7 @@ export const findIndex = <A>(predicate: Predicate<A>) => (fa: Zipper<A>): Option
  * `Some<Zipper<A>>` is returned.
  *
  * @category combinators
- * @since 0.1.25
+ * @since 0.1.26
  */
 export const moveByFindFirst = <A>(predicate: Predicate<A>) => (fa: Zipper<A>): Option<Zipper<A>> =>
   pipe(

test/Zipper.ts

@@ -275,9 +275,18 @@ describe('Zipper', () => {
   })
 
   it('moveByFindFirst', () => {
-    assert.deepStrictEqual(_.moveByFindFirst((a) => a === 0)(_.make([], 0, [])), O.some(_.make([], 0, [])))
+    const zipper = _.make([], 0, [])
+    assert.deepStrictEqual(
+      pipe(
+        zipper,
+        _.moveByFindFirst((a) => a === 0),
+        O.exists((z) => z === zipper)
+      ),
+      true
+    )
     assert.deepStrictEqual(_.moveByFindFirst((a) => a === 1)(_.make([], 0, [])), O.none)
     assert.deepStrictEqual(_.moveByFindFirst((a) => a === 0)(_.make([0], 1, [])), O.some(_.make([], 0, [1])))
     assert.deepStrictEqual(_.moveByFindFirst((a) => a === 1)(_.make([], 0, [1])), O.some(_.make([0], 1, [])))
+    assert.deepStrictEqual(_.moveByFindFirst((a) => a === 1)(_.make([1], 0, [1])), O.some(_.make([], 1, [0, 1])))
   })
 })