Add splitLines

snippets/splitLines.md

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+### splitLines
+
+Splits a multiline string into an array of lines.
+
+Use `String.split()` and a regular expression to match line breaks and create an array.
+
+```js
+const splitLines = str => str.split(/\r?\n/);
+```
+
+```js
+splitLines('This\nis a\nmultiline\nstring.\n'); // ['This', 'is a', 'multiline', 'string' , '']
+```