Here, cake is modified and reduces in size. Let yourDoublePieceOfCake = cake.splice(0,2) //(2)

Let myPieceOfCake = cake.splice(0, 1) // Ĭonsole.log(cake) // (5)

If items to insert such as itemToInsert1 are omitted, elements are only removed.

If deleteCountis omitted,the elements until the end of the array are removed.

An array is returned with the deleted items.

Splice is the real world cake 'slice': arr.splice(start, ) In addition to removing elements, splice is also used to add elements. Splice does operations in place, which means it modifies the exisiting array. Let yourDoublePieceOfCake = infiniteCake.slice(0,2) // (2) Ĭonsole.log(infiniteCake) //Īs you see, inifinteCake is unmodified. Let myPieceOfCake = infiniteCake.slice(0,1) //

If start is -ve, the elements are counted from the end.Ĭonst infiniteCake =.

If end is omitted, end becomes the end (last element) of the array.

A new array is returned and the original array is unmodified.

But unlike slicing a cake, slicing an array does not cut the actual array, but keeps it unmodified (infinite cake!). So I am hoping this trick will help both me and you in the future: S (p) lice = Slice + (p) => Slice + in (p) laceĪ() is used to slice an array from the start point to the end point, excluding the end.Īs the name suggests, it is used to slice elements out of an array. The array returned by slice() returns a shallow copy, meaning that any references within the original array will just be copied over as-is, and won't allocate memory for completely new objects.This title could have been 'how not to get confused between JavaScript's splice and slice,' because I can never remember the difference between the two.

Js slice array