splice javascript string code example

Example 1: javascript remove first character from string

var newStr = str.substring(1);

Example 2: js string slicing

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"

Example 3: javascript slice

//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"

console.log(str.slice(0, 2)); 
// expected output: "the"
// Up to and including the last index!!!
// Different for python.

Example 4: string splice

newStr = str.split(''); // or newStr = [...str];
newStr.splice(2,5);
newStr = newStr.join('');

Example 5: slice string js

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"

// source : https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/String/slice