slice in javascript

1// array.slice(start, end)
2const FRUITS = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
3var citrus = FRUITS.slice(1, 3);
4// citrus => [ 'Orange', 'Lemon' ]
5
6// Negative values slice in the opposite direction
7var fromTheEnd = FRUITS.slice(-3, -1);
8// fromTheEnd => [ 'Lemon', 'Apple' ]

1var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
2var citrus = fruits.slice(1, 3);
3// ["Orange", "Lemon"]

1//The slice() method extracts a section of a string and returns 
2//it as a new string, without modifying the original string.
3
4// same in array but you select elements not characters  
5
6
7const str = 'The quick brown fox jumps over the lazy dog.';
8
9console.log(str.slice(31));
10// expected output: "the lazy dog."
11
12console.log(str.slice(4, 19));
13// expected output: "quick brown fox"
14
15console.log(str.slice(-4));
16// expected output: "dog."
17
18console.log(str.slice(-9, -5));
19// expected output: "lazy"
20
21console.log(str.slice(0, 2)); 
22// expected output: "the"
23// Up to and including the last index!!!
24// Different for python. 

1var str1 = "Apple, Banana, Kiwi";
2
3var res1 = str1.slice(7, 13);
4var res2 = str1.slice(-12, -6);
5var res3 = str1.slice(7);
6var res4 = str1.slice(-12);
7var res5 = str1.substring(7, 13); //substring() cannot accept negative indexes like slice.
8var res6 = str1.substr(7, 9); // substr(start, length) is similar to slice(). second parameter of substr is length of string
9
10document.write("<br>" + "slice:", res1);
11document.write("<br>" + "slice -ve pos:", res2);
12document.write("<br>" + "slice with only start pos:", res3);
13document.write("<br>" + "slice with only -ve start pos", res4);
14document.write("<br>" + "substring:", res5);
15document.write("<br>" + "substr:", res6);

1const numbers = [2, 4, 5, 3, 8, 9, 11, 33, 44];
2const sliceNumbers = numbers.slice(2, 5)
3console.log(sliceNumbers)
4//Expected output:[ 5, 3, 8 ]

1JavaScript Array slice() Method The slice() method returns the selected elements in an array, as a new array object. The slice() method selects the elements starting at the given start argument, and ends at, but does not include, the given end argument. Note: The original array will not be changed.