Question

How to check if string contains any letter in Node.js

Answer 1

function containsAnyLetter(s) {
  	return /[a-zA-Z]/.test(s);
}

console.log(containsAnyLetter('node.js 17.1')); 
console.log(containsAnyLetter('java')); 
console.log(containsAnyLetter('948')); 
console.log(containsAnyLetter('17F')); 
console.log(containsAnyLetter('A')); 
console.log(containsAnyLetter('a')); 
console.log(containsAnyLetter(' ')); 

 
 
 
 
/*
run:
 
true
true
false
true
true
true
false

*/

 

70+ SQL courses for beginners and professionals

Answer 2

function containsAnyLetter(s) {
  	return /[a-z]/i.test(s);
}

console.log(containsAnyLetter('node.js 17.1')); 
console.log(containsAnyLetter('java')); 
console.log(containsAnyLetter('948')); 
console.log(containsAnyLetter('17F')); 
console.log(containsAnyLetter('A')); 
console.log(containsAnyLetter('a')); 
console.log(containsAnyLetter(' ')); 

 
 
 
 
/*
run:
 
true
true
false
true
true
true
false

*/

 

70+ SQL courses for beginners and professionals