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JavaScript - use lodash to compare array items existence without order

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Created by:

Aleena

694

In this article, we would like to show you how to use lodash to compare if arrays are the same but with changed items order in JavaScript.

Practical examples

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Example 1

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In this example, we use _.isEqual() method with sort() to check if array items are the same (or the same with changed order).

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<!doctype html>
<html>
<head>
  <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>
</head>
<body>
  <script>
​
    var array1 = [['a', 'b'], ['b', 'c']];
    var array2 = [['b', 'c'], ['a', 'b']];
    
    var result = _.isEqual(array1.sort(), array2.sort());
​
    console.log(result); // true
​
  </script>
</body>
</html>

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Example 2

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In this example, we use _.isEqual() method with _.sortBy() to compare arrays.

xxxxxxxxxx
 
<!doctype html>
<html>
<head>
  <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>
</head>
<body>
  <script>
​
    var array1 = [['a', 'b'], ['b', 'c']];
    var array2 = [['b', 'c'], ['a', 'b']];
    
    var result = _.isEqual(_.sortBy(array1), _.sortBy(array2));
​
    console.log(result); // true
​
  </script>
</body>
</html>