replace all digit in a string with $ character

Question

Write a JavaScript program to replace all digit in a string with $ character.

function replace_first_digit(input_str) {
  return input_str.replace(/[0-9]/, '$');
}
console.log(replace_first_digit("abc1dabc"));
console.log(replace_first_digit("p3ytho2n"));
console.log(replace_first_digit("ab10cabc"));

@SachithWickramaarachchi, no, it doesn't. _All_ numbers have to be replaced. — Andy, Sep 21 '21 at 11:53
erm.... `replace_first_digit` is the name of the method, and youre asking about replacing _all_ digits. — Jamiec, Sep 21 '21 at 11:55

score 4 · Answer 1 · answered Sep 21 '21 at 11:53

You need the addition of the g modifier to make the replace work on multiple matches

function replace_first_digit(input_str) {
  return input_str.replace(/[0-9]/g, '$');
}
console.log(replace_first_digit("abc1dabc"));
console.log(replace_first_digit("p3ytho2n"));
console.log(replace_first_digit("ab10cabc"));

However, the naming of the function as replace_first_digit makes me suspect that you might have misunderstood the requirement and your original code was correct!

score 1 · Answer 2 · answered Sep 21 '21 at 11:53

1

Use the g-modifier/flag

const replace_first_digit = input_str => input_str.replace(/[0-9]/g, '$');
console.log(replace_first_digit("abc1dabc"));
console.log(replace_first_digit("p3ytho2n"));
console.log(replace_first_digit("ab10cabc"));

answered Sep 21 '21 at 11:53

KooiInc

112,400
31
139
174

score 1 · Answer 3 · answered Sep 21 '21 at 11:54

1

This will do the trick

function replace_first_digit(input_str) {
  return input_str.replace(/\d/g, '$');
}
console.log(replace_first_digit("abc1dabc"));
console.log(replace_first_digit("p3ytho2n"));
console.log(replace_first_digit("ab10cabc"));

answered Sep 21 '21 at 11:54

Harshit Rastogi

1,627
1
7
17

score 0 · Answer 4 · answered Sep 21 '21 at 11:56

function replace_all_digits(input_str) {
  return input_str.split('').map((i)=> isNaN(i) ? i : '$').join('')
}
console.log(replace_all_digits("abc1dabc"));
console.log(replace_all_digits("p3ytho2n"));
console.log(replace_all_digits("ab10cabc"));

Iterates over each letter and checks if it can be a number. If so, returns a $ otherwise the letter.

replace all digit in a string with $ character

4 Answers4