ES6 - Cuerdas

El objeto String le permite trabajar con una serie de caracteres; envuelve el tipo de datos primitivo de cadena de JavaScript con varios métodos auxiliares.

Como JavaScript convierte automáticamente entre primitivas de cadena y objetos de cadena, puede llamar a cualquiera de los métodos auxiliares del objeto String en una primitiva de cadena.

Utilice la siguiente sintaxis para crear un objeto String.

var val = new String(string);

El parámetro de cadena es una serie de caracteres que se ha codificado correctamente. Cuerda.

Propiedades de cadena

A continuación se muestra una lista de las propiedades del objeto String y su descripción.

No Señor Descripción de propiedad
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.