JAVASCRIPT

javascript splice

let arr = ['foo', 'bar', 10, 'qux'];

// arr.splice(<index>, <steps>, [elements ...]);

arr.splice(1, 1);			// Removes 1 item at index 1
// => ['foo', 10, 'qux']

arr.splice(2, 1, 'tmp');	// Replaces 1 item at index 2 with 'tmp'
// => ['foo', 10, 'tmp']

arr.splice(0, 1, 'x', 'y');	// Inserts 'x' and 'y' replacing 1 item at index 0
// => ['x', 'y', 10, 'tmp']

splice in javascript

The splice() method adds and/or removes array elements.
The splice() method overwrites the original array.
array.splice(index, howmany to remove, item1, ....., itemX)
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 1, "Lemon", "Kiwi");
//Banana,Orange,Lemon,Kiwi,Mango

JavaScript Array splice()

// The splice() method can be used to add new items to an array:
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 0, "Lemon", "Kiwi");
 // >> ["Banana", "Orange", "Lemon", "Kiwi", "Apple", "Mango"]

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//upvote ⇑⇑ , so can the others benefit also . @mohammad alshraideh ( ͡~ ͜ʖ ͡°)

array.splice javascript

const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]

months.splice(4, 1, 'May');
// replaces 1 element at index 4
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "May"]

months.splice(0, 1);
// removes 1 element at index 0
console.log(months);
// expected output: Array ["Feb", "March", "April", "May"]

splice()

/"removes any number of consecutive elements from anywhere in an array."/
let array = ['today', 'was', 'not', 'so', 'great'];

array.splice(2, 2);
// remove 2 elements beginning with the 3rd element
// array now equals ['today', 'was', 'great']

splice js

// splice method 
// replace Mongo as olive using splice 
const FRUITS = ["Banana", "Orange", "Lemon", "Apple", "Mango"];


let  ind=FRUITS.indexOf("Mango");

console.log(ind); // 4
console.log(FRUITS.splice(ind,1,'olive')); //deleted data is [ 'Mango' ]
console.log(FRUITS); // [ 'Banana', 'Orange', 'Lemon', 'Apple', 'olive' ]

javascript splice

const arrayToBeFixed = ['a', 'b', 'wrong', 'f']

const removedElements = arrayToBeFixed.splice(2, // Where to insert
1, // number of elements to be removed from arrayToBeFixed
'c', 'd', 'e', // elements to add starting from the insertion index 
);

console.log(arrayToBeFixed) // ['a' 'b', 'c', 'd', 'e', 'f']
console.log(removedElements) // ['wrong']

splice javascritp

let colors = ['red', 'blue', 'green'];

let index_element_to_be_delete = colors.indexOf('green');

colors.splice(index_element_to_be_delete); 

//Colors now: ['red', 'blue']

javascript splice

/*splice(start)
splice(start, deleteCount)
splice(start, deleteCount, replaceitem1)
splice(start, deleteCount, replaceitem1, ""2, ""N) */


//examples
const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]

months.splice(4, 1, 'May');
// replaces 1 element at index 4
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "May"]

splice javascript

const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]

months.splice(4, 1, 'May');

splice javascript

const numbers = [10, 11, 12, 12, 15];
const startIndex = 3;
const amountToDelete = 1;

numbers.splice(startIndex, amountToDelete, 13, 14);
// the second entry of 12 is removed, and we add 13 and 14 at the same index
console.log(numbers);
// returns [ 10, 11, 12, 13, 14, 15 ]

array.splice

let arr = [1,2,3]

// delete elements:
arr.splice(/*starting index*/, /*number of elements to delete*/)

// delete and replace elements:
arr.splice(/*starting index*/, /*number of elements to delete*/, /* value(s) to replace what was deleted */)

JavaScript Splice

    let fruits = ["apple", "pear", "plum", "orange", "cherry"];
    fruits.splice(1, 0, 'watermelon');
    console.log(fruits);
    fruits.splice(1, 1);
    console.log(fruits)
    /*
    
[ 'apple', 'watermelon', 'pear', 'plum', 'orange', 'cherry' ]
[ 'apple', 'pear', 'plum', 'orange', 'cherry' ]
    
    */

splice javascript

const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]

months.splice(4, 1, 'May');

Splice in javascript

//Splice
const numbers = [3, 6, 4, 8, 9, 19, 15, 21, 45, 87];
const numberSplice = numbers.splice(0, 3);
console.log(numberSplice);
//Output: [ 3, 6, 4 ]

splice method js

let myFish = ['angel', 'clown', 'mandarin', 'sturgeon']
//insert new element into array at index 2
let removed = myFish.splice(2, 0, 'drum')

// myFish is ["angel", "clown", "drum", "mandarin", "sturgeon"] 
// removed is [], no elements removed

splice javascript

/"removes consecutive elements from anywhere in an array and optionally replace with other elements"/
let arr = ['a1','a2','a3',....]
let replaceArr = ['el1','el2',....]
arr.splice(startIdx,steps,'el1','el2',.....) 
// selects startIdx to (startIdx + steps) like slice both inclusive and replaces with el1,el2...
// OR 
arr.splice(startIdx,steps,[...replaceArr]) // same using spread
// len(replaceArr) need not be equal to steps, replaceArr is even optional

Javascript splice

const numbers = [2, 4, 5, 3, 8, 9, 11, 33, 44];
const spliceNumbers = numbers.splice(0, 5)
//start from 0 && remove next 5 elements
console.log(spliceNumbers)
//Expected output:[ 2, 4, 5, 3, 8 ]

splice mdn

let myFish = ['angel', 'clown', 'drum', 'mandarin', 'sturgeon']
let removed = myFish.splice(3, 1)

// myFish is ["angel", "clown", "drum", "sturgeon"]
// removed is ["mandarin"]

splice javascript

const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]

months.splice(4, 1, 'May');

Array#splice

let arrDeletedItems = array.splice(start[, deleteCount[, item1[, item2[, ...]]]])

javascript splice method

js splice method

array splice

var arrayElements = [1,2,3,4,2];

console.log(arrayElements);

//[1, 2, 3, 4, 2] 

arrayElements.forEach((element,index)=>{
   if(element==2) arrayElements.splice(index,1);
});

console.log(arrayElements);

//[1, 3, 4]

splice en javascript

const alpha = {
  1:"Z",
  2:"Y",
  3:"X",
  4:"W",
  ...
  24:"C",
  25:"B",
  26:"A"
};

const thirdLetter = alpha[2];
const lastLetter = alpha[24];

const value = 2;
const valueLookup = alpha[value];