feat(removeElementByIndex): add removeElementByIndex function (#233)

Closes #232

Author: Stanisław Jaros

Diff for: src/index.js

@@ -88,6 +88,7 @@ import timeSince from './timeSince'
 import toPower from './to-power'
 import truncate from './truncate'
 import validateEmail from './validateEmail'
+import removeElementByIndex from './removeElementByIndex'
 
 export {
   reverseArrayInPlace,
@@ -180,4 +181,5 @@ export {
   numberToString,
   largest,
   hex2hsl,
+  removeElementByIndex,
 }

Diff for: src/removeElementByIndex.js

@@ -0,0 +1,15 @@
+export default removeElementByIndex
+
+/**
+ * Original source: https://stackoverflow.com/a/5767335/10309455
+ * This method removes the element from an array by index and returns edited array
+ * @param {Array} array - base array
+ * @param {Number} index - index to delete
+ * @returns {Array} - array without deleted item
+ */
+
+function removeElementByIndex(array, index) {
+  const updatedArray = [...array]
+  updatedArray.splice(index, 1)
+  return updatedArray
+}

Diff for: test/removeElementByIndex.test.js

@@ -0,0 +1,10 @@
+import test from 'ava'
+import {removeElementByIndex} from '../src'
+
+test('Removes index from an array', t => {
+  const array = [1, 2, 3]
+  const expected = [1, 3]
+  const actual = removeElementByIndex(array, 1)
+
+  t.deepEqual(actual, expected)
+})