feat: add find and replace function (#75)

Author: ganes1410

src/index.js

@@ -21,6 +21,7 @@ import multiply from './multiply'
 import square from './square'
 import sum from './sum'
 import dec2bin from './dec2bin'
+import searchAndReplace from './search-and-replace'
 
 export {
   flatten,
@@ -46,4 +47,5 @@ export {
   square,
   sum,
   dec2bin,
+  searchAndReplace,
 }

src/search-and-replace.js

@@ -0,0 +1,18 @@
+export default searchAndReplace
+
+/**
+ *Original Source:
+ *https://stackoverflow.com/questions/1144783/how-to-replace-all-occurrences-of-a-string-in-javascript/1144788#1144788
+ *
+ *This method will replace the matched word in the given string
+ *string
+
+ * @param {String} str - The given string
+ * @param {String} find - The particular string that we want to replace
+   @param {String} replace - The string to replace the matched string
+   @return {String} - The final string with replaced words
+ */
+
+function searchAndReplace(str, find, replace) {
+  return str.replace(new RegExp(find, 'g'), replace)
+}

test/search-and-replace.test.js

@@ -0,0 +1,11 @@
+import test from 'ava'
+import {searchAndReplace} from '../src'
+
+test('check the resultant string', t => {
+    const str = 'the quick brown fox jumps over the lazy dog';
+    const find = 'lazy';
+    const replace = 'active';
+    const expected = 'the quick brown fox jumps over the active dog';
+    const actual = searchAndReplace(str, find, replace);
+    t.deepEqual(actual, expected);
+})