#JS SPLICE RETURN VALUE CODE#

Try console.log (arr) and you will see that it's empty. myFish is // removed is Specifications Specification 1 But if I am starting at index 0, and removing 1 item then why would it not return an empty array Jim Moody at 20:21 3 Because splice () returns the value which was 'spliced/cut/removed' from the original array. Removed = myFish.splice(myFish.length -3, 2) myFish is // removed is // myFish is // removes 2 elements from index 2 Removed = myFish.splice( 0, 2, ' parrot', ' anemone', ' blue') myFish is // removed is // myFish is // removes 2 elements from index 0, and inserts 'parrot', 'anemone' and 'blue' Removed = myFish.splice( 2, 1, ' trumpet') myFish is // removed is // myFish is // removes 1 element from index 2, and inserts 'trumpet' myFish is // removed is, no elements removed // myFish is // removes 1 element from index 3 removes 0 elements from index 2, and inserts 'drum' var removed = myFish.splice( 2, 0, ' drum')

#JS SPLICE RETURN VALUE CODE#

The following script illustrates the use of splice():Ĭopy Code var myFish = If you specify a different number of elements to insert than the number you're removing, the array will have a different length at the end of the call. If no elements are removed, an empty array is returned. If only one element is removed, an array of one element is returned. Return valueĪn array containing the deleted elements. If you don't specify any elements, splice() will only remove elements from the array. The elements to add to the array, beginning at the start index. By using splice(), we can remove, add or replace elements of an. If deleteCount is omitted, deleteCount will be equal to ( arr.length - start). This method modifies the original array and returns an array containing the deleted elements.

If deleteCount is greater than the number of elements left in the array starting at start, then all of the elements through the end of the array will be deleted. In this case, you should specify at least one new element. If deleteCount is 0, no elements are removed. deleteCount An integer indicating the number of old array elements to remove. If negative, will begin that many elements from the end. If greater than the length of the array, actual starting index will be set to the length of the array. Parameters start Index at which to start changing the array (with origin 0). inde圎nd represents a character that's before indexStart), an empty string is returned.Array.

If inde圎nd More formally, in this case, the substring ends at max(inde圎nd + str.length, 0). If indexStart = str.length, slice() extracts to the end of the string.Description The splice () method is a mutating method. However, it returns a new array instead of modifying the original array. If only one element is removed, an array of one element is returned. The toSpliced() method, like splice(), does multiple things at once: it removes the given number of elements from the array, starting at a given index, and then inserts the given elements at the same index. If indexStart >= str.length, an empty string is returned. Return value An array containing the deleted elements.For example, str.slice(1, 4) extracts the second character through the fourth character (characters indexed 1, 2, and 3). Slice() extracts up to but not including inde圎nd. Changes to the text in one string do not affect the other string. Slice() extracts the text from one string and returns a new string. Object.prototype._lookupSetter_() Deprecated.Object.prototype._lookupGetter_() Deprecated.Object.prototype._defineSetter_() Deprecated.Object.prototype._defineGetter_() Deprecated.

Js splice return value