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String: replace()

The replace method replaces a substring with another:

let str = 'JavaScript';
let newstr = str.replace('Java', 'ECMA');

'Java' is replaced with 'ECMA'. Thus newstr has the value 'ECMAScript'. The original string remains unchanged. Only the first occurrence is replaced:

let newstr = 'Dada'.replace('a', 'i');

newstr has the value 'Dida' and not 'Didi'.

Exercise

Write a function normalize, that replaces '-' with '/' in a date string.

Example: normalize('20-05-2017') should return '20/05/2017'.

+ Hint

function normalize(date) {
  // Use replace() twice.
}

+ Solution

function normalize(date) {
  let newDate = date.replace('-','/');
  newDate = newDate.replace('-','/');
  return newDate;
}