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77 lines
1.7 KiB
Markdown
77 lines
1.7 KiB
Markdown
---
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id: 68cae5b538ff798bbd4da006
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title: "Challenge 68: Credit Card Masker"
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challengeType: 29
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dashedName: challenge-68
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---
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# --description--
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Given a string of credit card numbers, return a masked version of it using the following constraints:
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- The string will contain four sets of four digits (`0-9`), with all sets being separated by a single space, or a single hyphen (`-`).
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- Replace all numbers, except the last four, with an asterisk (`*`).
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- Leave the remaining characters unchanged.
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For example, given `"4012-8888-8888-1881"` return `"****-****-****-1881"`.
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# --hints--
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`mask("4012-8888-8888-1881")` should return `"****-****-****-1881"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(mask("4012-8888-8888-1881"), "****-****-****-1881")`)
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}})
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```
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`mask("5105 1051 0510 5100")` should return `"**** **** **** 5100"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(mask("5105 1051 0510 5100"), "**** **** **** 5100")`)
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}})
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```
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`mask("6011 1111 1111 1117")` should return `"**** **** **** 1117"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(mask("6011 1111 1111 1117"), "**** **** **** 1117")`)
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}})
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```
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`mask("2223-0000-4845-0010")` should return `"****-****-****-0010"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(mask("2223-0000-4845-0010"), "****-****-****-0010")`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def mask(card):
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return card
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```
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# --solutions--
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```py
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def mask(card):
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if '-' in card:
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split = card.split('-')
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return f"****-****-****-{split[3]}"
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else:
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split = card.split(' ')
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return f"**** **** **** {split[3]}"
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```
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