Question

How to check if string contains any letter in TypeScript

Answer 1

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

console.log(containsAnyLetter('typescript 4.5')); 
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
 
*/

 

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Answer 2

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

console.log(containsAnyLetter('typescript 4.5')); 
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
 
*/

 

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