Travis build: 1665

README.md

@@ -98,6 +98,8 @@ average(1, 2, 3);
 <details>
 <summary>View contents</summary>
 
+* [`bifurcate`](#bifurcate)
+* [`bifurcateBy`](#bifurcateby)
 * [`chunk`](#chunk)
 * [`compact`](#compact)
 * [`countBy`](#countby)
@@ -761,6 +763,52 @@ const unary = fn => val => fn(val);
 ---
  ## 📚 Array
 
+### bifurcate
+
+Splits values into two groups. If an element in `filter` is truthy, the corresponding element in the collection belongs to the first group; otherwise, it belongs to the second group.
+
+Use `Array.reduce()` and `Array.push()` to add elements to groups, based on `filter`.
+
+```js
+const bifurcate = (arr, filter) =>
+  arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [[], []]);
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+bifurcate(['beep', 'boop', 'foo', 'bar'], [true, true, false, true]); // [ ['beep', 'boop', 'bar'], ['foo'] ]
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
+### bifurcateBy
+
+Splits values into two groups according to a predicate function, which specifies which group an element in the input collection belongs to. If the predicate function returns a truthy value, the collection element belongs to the first group; otherwise, it belongs to the second group.
+
+Use `Array.reduce()` and `Array.push()` to add elements to groups, based on the value returned by `fn` for each element.
+
+```js
+const bifurcateBy = (arr, fn) =>
+  arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [[], []]);
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+bifurcateBy(['beep', 'boop', 'foo', 'bar'], x => x[0] === 'b'); // [ ['beep', 'boop', 'bar'], ['foo'] ]
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
 ### chunk
 
 Chunks an array into smaller arrays of a specified size.

snippets/bifurcate.md

@@ -6,12 +6,9 @@ Use `Array.reduce()` and `Array.push()` to add elements to groups, based on `fil
 
 ```js
 const bifurcate = (arr, filter) =>
-  arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [
+  arr.reduce((acc, val, i) => (acc[filter[i] ? 0 : 1].push(val), acc), [[], []]);
-    [],
-    [],
-  ]);
 ```
 
 ```js
-bifurcate([ 'beep', 'boop', 'foo', 'bar' ], [ true, true, false, true ]); // [ ['beep', 'boop', 'bar'], ['foo'] ]
+bifurcate(['beep', 'boop', 'foo', 'bar'], [true, true, false, true]); // [ ['beep', 'boop', 'bar'], ['foo'] ]
 ```

snippets/bifurcateBy.md

@@ -6,12 +6,9 @@ Use `Array.reduce()` and `Array.push()` to add elements to groups, based on the
 
 ```js
 const bifurcateBy = (arr, fn) =>
-  arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [
+  arr.reduce((acc, val, i) => (acc[fn(val, i) ? 0 : 1].push(val), acc), [[], []]);
-    [],
-    [],
-  ]);
 ```
 
 ```js
-bifurcateBy([ 'beep', 'boop', 'foo', 'bar' ], x => x[0] === 'b'); // [ ['beep', 'boop', 'bar'], ['foo'] ]
+bifurcateBy(['beep', 'boop', 'foo', 'bar'], x => x[0] === 'b'); // [ ['beep', 'boop', 'bar'], ['foo'] ]
 ```