In this case I cut just the choices index, passing(where is the index “AND ”number of places I want cut “1 is the index itself”) Another example: let arr = arr.splice() arr.splice(0,1 ) console.log(arr) // ` In this case I said that from index 3, you can cut all the placesīeing: 1 = index 0 “zero”, 2 = index 1, 3 = index 2, “test” = index 3 and “ hello-world!!!” = index 4 Other Example: let arr = arr.splice() arr.splice(3,1 ) console.log(arr) // `
#Splice javascript how to#
how to use it in practice? let arr = arr.splice(3) console.log(arr) // ` These are the elements that you will add to the operation list. So if you use “.splice(2,1) “ the number 2 would be the index and 1 would be the number of places to be cut, always counting from the index, so the index itself corresponds to a place, so in this example the splicing will only cut the index itself.Įxample would be “splice(2,2)”, in this case the splice would cut the matching element with index 2 one place ahead, because as the closest, the index itself represents a place, so it will cut the index plus one place, thus two place and so on. Index: The Index contained within the method is a parameter that indicates from where the operation will start.Įach object has its index that corresponds to its position within the array, the first object being starting with index zero “0”.ĭeleteCount: It corresponds to the place number you want to cut, being contacted from the corresponding index, that is, place 1 itself. Its base structure and parameters are: array.splice( index]]) Splice is a method to "mutate" or "modify" an array, this is important because in javascript there are several ways to assemble structures such as "mutable" and "non-mutable" This method is used to remove some object from the array from an index. First of all, we need to know: what is a splice?
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