I only used shift() method for 'arr1[]', but that method modified 'arr2[]', too. How can fix it?
<script>
var arr1=['a','b','c','d','e'];
var arr2=arr1;
arr2.shift();
alert(arr1);
alert(arr2);
</script>
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JoMars
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1`var arr2 = arr1;` does not make a copy of the array. – Pointy Jun 23 '19 at 16:02
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You only have one array. `arr1` and `arr2` both have the same value: a reference to that array. – Quentin Jun 23 '19 at 16:02
1 Answers
-1
to have a real assignation do
var arr1=['a','b','c','d','e'];
var arr2 = Object.assign([], arr1);
arr2.shift();
console.log ('arr1:', JSON.stringify(arr1));
console.log ('arr2:', JSON.stringify(arr2));
Mister Jojo
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