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javascript slice array
<![CDATA[// array.slice(start, end)
const FRUITS = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = FRUITS.slice(1, 3);
// citrus => [ 'Orange', 'Lemon' ]
// Negative values slice in the opposite direction
var fromTheEnd = FRUITS.slice(-3, -1);
// fromTheEnd => [ 'Lemon', 'Apple' ]]]>
javascript get sub array
<![CDATA[var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = fruits.slice(1, 3);
// ["Orange", "Lemon"]]]>
array.slice
<![CDATA[const animals = ['ant', 'bison', 'camel', 'duck', 'elephant'];
console.log(animals.slice(2));
// expected output: Array ["camel", "duck", "elephant"]
console.log(animals.slice(2, 4));
// expected output: Array ["camel", "duck"]
console.log(animals.slice(1, 5));
// expected output: Array ["bison", "camel", "duck", "elephant"]]]>
slice() in javascript
<![CDATA[slice(beginIndex)
slice(beginIndex, endIndex)
// beginIndex: The index at which to begin extraction
// endIndex: This index will not be included.
// Return: A new string containing the extracted section.
let str1 = 'The morning is upon us.'
// the length of str1 is 23.
let str2 = str1.slice(1, 8) // OUTPUT: he morn
let str3 = str1.slice(4, -2)// OUTPUT: morning is upon u
let str4 = str1.slice(12) // OUTPUT: is upon us.
let str5 = str1.slice(30) // OUTPUT: ""
// NEGATIVES
beginIndex is negative:
// it is treated as (str.length + beginIndex)
endIndex is negative:
// it is treated as (str.length + endIndex)]]>
js slice
<![CDATA[//The slice() method extracts a section of a string and returns
//it as a new string, without modifying the original string.
// same in array but you select elements not characters
const str = 'The quick brown fox jumps over the lazy dog.';
console.log(str.slice(31));
// expected output: "the lazy dog."
console.log(str.slice(4, 19));
// expected output: "quick brown fox"
console.log(str.slice(-4));
// expected output: "dog."
console.log(str.slice(-9, -5));
// expected output: "lazy"
]]>
array index javascript show only first 2 elements
<![CDATA[array.slice(0, n);]]>
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