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1.4 KiB
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id, title, challengeType, dashedName
| id | title | challengeType | dashedName |
|---|---|---|---|
| 68cae5b538ff798bbd4da006 | Challenge 68: Credit Card Masker | 28 | challenge-68 |
--description--
Given a string of credit card numbers, return a masked version of it using the following constraints:
- The string will contain four sets of four digits (
0-9), with all sets being separated by a single space, or a single hyphen (-). - Replace all numbers, except the last four, with an asterisk (
*). - Leave the remaining characters unchanged.
For example, given "4012-8888-8888-1881" return "****-****-****-1881".
--hints--
mask("4012-8888-8888-1881") should return "****-****-****-1881".
assert.equal(mask("4012-8888-8888-1881"), "****-****-****-1881");
mask("5105 1051 0510 5100") should return "**** **** **** 5100".
assert.equal(mask("5105 1051 0510 5100"), "**** **** **** 5100");
mask("6011 1111 1111 1117") should return "**** **** **** 1117".
assert.equal(mask("6011 1111 1111 1117"), "**** **** **** 1117");
mask("2223-0000-4845-0010") should return "****-****-****-0010".
assert.equal(mask("2223-0000-4845-0010"), "****-****-****-0010");
--seed--
--seed-contents--
function mask(card) {
return card;
}
--solutions--
function mask(card) {
const split = card.split(card.includes('-') ? '-' : ' ');
return card.includes('-') ?
`****-****-****-${split[3]}` :
`**** **** **** ${split[3]}`;
}