Prevent from mutating original data array

Philipp Alferov · Philipp Alferov · commit 0c37df96c75a · 2018-08-20T14:56:53.000-04:00
diff --git a/index.js b/index.js
@@ -83,7 +83,7 @@ module.exports = function arrayToTree(data, options) {
     throw new TypeError('Expected an object but got an invalid argument');
   }
 
-  var grouped = groupByParents(data, options);
+  var grouped = groupByParents(data.slice(), options);
   return createTree(
     grouped,
     grouped[options.rootID],

Original file line number	Diff line number	Diff line change
`@@ -83,7 +83,7 @@ module.exports = function arrayToTree(data, options) {`
`83`	`83`	`throw new TypeError('Expected an object but got an invalid argument');`
`84`	`84`	`}`
`85`	`85`
`86`		`- var grouped = groupByParents(data, options);`
	`86`	`+ var grouped = groupByParents(data.slice(), options);`
`87`	`87`	`return createTree(`
`88`	`88`	`grouped,`
`89`	`89`	`grouped[options.rootID],`