ES6 - Strings

O objeto String permite trabalhar com uma série de caracteres; ele envolve o tipo de dados primitivo de string do JavaScript com vários métodos auxiliares.

Como o JavaScript converte automaticamente entre primitivos de string e objetos String, você pode chamar qualquer um dos métodos auxiliares do objeto String em um primitivo de string.

Use a seguinte sintaxe para criar um objeto String.

var val = new String(string);

O parâmetro string é uma série de caracteres codificados corretamente. Corda.

Propriedades da string

A seguir está uma lista das propriedades do objeto String e sua descrição.

Sr. Não	Descrição da Propriedade
1	constructor Returns a reference to the String function that created the object .
2	length Returns the length of the string.
3	Prototype The prototype property allows you to add properties and methods to an object .

String Methods

Here is a list of the methods available in String object along with their description.

Sr.No	Method & Description
1	charAt() Returns the character at the specified index.
2	charCodeAt() Returns a number indicating the Unicode value of the character at the given index.
3	concat() Combines the text of two strings and returns a new string.
4	indexOf() Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found.
5	lastIndexOf() Returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found.
6	localeCompare() Returns a number indicating whether a reference string comes before or after or is the same as the given string in a sorted order.
7	match() Used to match a regular expression against a string.
8	replace() Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring.
9	search() Executes the search for a match between a regular expression and a specified string.
10	slice() Extracts a section of a string and returns a new string.
11	split() Splits a String object into an array of strings by separating the string into substrings.
12	substr() Returns the characters in a string beginning at the specified location through the specified number of characters.
13	substring() Returns the characters in a string between two indexes into the string.
14	toLocaleLowerCase() The characters within a string are converted to lower case while respecting the current locale.
15	toLocaleupperCase() The characters within a string are converted to uppercase while respecting the current locale.
16	toLowerCase() Returns the calling string value converted to lowercase.
17	toString() Returns a string representing the specified object.
18	toUpperCase() Returns the calling string value converted to uppercase.
19	valueOf() Returns the primitive value of the specified object.