JavaScript Program to Match Single Character with Multiple Possibilities
Last Updated :
22 Sep, 2023
In this article, we will write programs to check all possible matching in JavaScript. We will check the occurrence of characters individually in the given string or sequence. In this article, we will check the occurrence of vowels in the given string.
The RegExp test() Method in JavaScript is used to test for the match in a string. If there is a match this method returns true else it returns false.
Syntax:
RegExpObject.test( str )
Example: This example illustrates matching a single character with Multiple possibilities using the RegExp test() Method.
Javascript
let string = "GeeksforGeeks" ;
let regx = /[aeiou]/g;
let result = regx.test(string);
console.log(result);
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The JavaScript String match() method is an inbuilt function in JavaScript used to search a string for a match against any regular expression. If the match is found, then this will return the match as an array.
Syntax:
string.match( regExp );
Example: This example illustrates matching a single character with Multiple possibilities using the String match() Method
Javascript
let string = "GeeksforGeeks" ;
let regx = /[aeiou]/g;
let result = [...string.match(regx)];
console.log(result);
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Output
[ 'e', 'e', 'o', 'e', 'e' ]
JavaScript String includes() method determines whether a string contains the given characters within it or not. This method returns true if the string contains the characters, otherwise, it returns false.
Syntax:
string.includes(searchvalue, start);
Example: This example illustrates matching a single character with Multiple possibilities using the includes() Method.
Javascript
let string = "GeeksforGeeks" ;
const character = "aeiou" ;
result = [];
character.split( "" ).some((char) => {
if (string.includes(char))
result.push(char);
});
console.log(result);
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The JavaScript String indexOf() method finds the index of the first occurrence of the argument string in the given string. The value returned is 0-based.
Syntax:
str.indexOf(searchValue , index);
Example: This example illustrates matching a single character with Multiple possibilities using the String indexOf() Method.
Javascript
let string = "JavaScript" ;
const character = "aeiou" ;
result = [];
Array.from(character).some((char) => {
if (string.indexOf(char) !== -1)
result.push(char);
});
console.log(result);
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