To summarize, the difference in the results is because in Code 1, the splice() method is called on the new array created by om(), while in Code 2, the splice() method is called on a separate array ( newArr) created by om(). The element "my" is removed from newArr, and the resulting array has a length of 3. The splice() method modifies the array in place, just like before, but since newArr is a separate array from targetArr, the modification doesn't affect the original targetArr array. Example 1: In this example, the slice () method extracts the array from the given array starting from index 2 and including all the elements less than index 4. Below is an example of the Array slice () method. In Code 2, om(targetArr) also creates a new array with the elements from targetArr, but this time, the splice(2, 1) method is called on the newArr array itself. The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place. Return value: This method returns a new array containing some portion of the original array. More Examples At position 2, add new items, and remove 1 item: const fruits 'Banana', 'Orange', 'Apple', 'Mango' fruits. Array elements which do not pass the callbackFn test are not included in the new array. It calls a provided callbackFn function once for each element in an array, and constructs a new array of all the values for which callbackFn returns a truthy value. The splice() method returns an array containing the removed elements, so errnewArr ends up being an array with the removed element "my". , itemX) Parameters Return Value An array containing the removed items (if any). Description The filter () method is an iterative method. How to Use JavaScript Array Splice The splice () method modifies the original array by altering its items. The splice() method modifies the array in place by removing one element at index 2. Using the JavaScript array splice () method, you can remove the items from the existing array, add new items to the existing array, or even swap the items from the existing array with new items. This method modifies the original array and returns the removed elements as a new array. It lets you change the content of your array by removing or replacing existing elements with new ones. Note: If replacement is not an array, it will be typecast to one (i.e. Note: Numerical keys in array are not preserved. In Code 1, the om(targetArr) creates a new array using the elements from targetArr, and then the splice(2, 1) method is called on that new array. The splice () method is a built-in method for JavaScript Array objects. int length null, mixed replacement ): array Removes the elements designated by offset and length from the array array, and replaces them with the elements of the replacement array, if supplied. The difference in the results between the two code snippets is due to the way the splice() method works and how it affects the original array and the newly created array.
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