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105 lines
2.8 KiB
Markdown
105 lines
2.8 KiB
Markdown
---
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id: 6a22d77ddf034bc4e35b1d5c
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title: "Challenge 355: Morse Code"
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challengeType: 29
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dashedName: challenge-355
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---
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# --description--
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Given a Morse code string, return the decoded message using the following table:
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| Code | Letter | Code | Letter |
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|------|--------|------|--------|
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| `.-` | `A` | `-.` | `N` |
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| `-...` | `B` | `---` | `O` |
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| `-.-.` | `C` | `.--.` | `P` |
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| `-..` | `D` | `--.-` | `Q` |
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| `.` | `E` | `.-.` | `R` |
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| `..-.` | `F` | `...` | `S` |
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| `--.` | `G` | `-` | `T` |
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| `....` | `H` | `..-` | `U` |
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| `..` | `I` | `...-` | `V` |
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| `.---` | `J` | `.--` | `W` |
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| `-.-` | `K` | `-..-` | `X` |
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| `.-..` | `L` | `-.--` | `Y` |
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| `--` | `M` | `--..` | `Z` |
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- Letters are separated by a single space
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- Words are separated by three spaces
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# --hints--
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`decode_morse("--..")` should return `"Z"`.
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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(decode_morse("--.."), "Z")`)
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}})
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```
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`decode_morse("... --- ...")` should return `"SOS"`.
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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(decode_morse("... --- ..."), "SOS")`)
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}})
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```
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`decode_morse("..-. .-. . . -.-. --- -.. . -.-. .- -- .--.")` should return `"FREECODECAMP"`.
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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(decode_morse("..-. .-. . . -.-. --- -.. . -.-. .- -- .--."), "FREECODECAMP")`)
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}})
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```
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`decode_morse(".... . .-.. .-.. --- .-- --- .-. .-.. -..")` should return `"HELLO WORLD"`.
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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(decode_morse(".... . .-.. .-.. --- .-- --- .-. .-.. -.."), "HELLO WORLD")`)
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}})
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```
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`decode_morse("- .... . --.- ..- .. -.-. -.- -... .-. --- .-- -. ..-. --- -..- .--- ..- -- .--. . -.. --- ...- . .-. - .... . .-.. .- --.. -.-- -.. --- --.")` should return `"THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG"`.
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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(decode_morse("- .... . --.- ..- .. -.-. -.- -... .-. --- .-- -. ..-. --- -..- .--- ..- -- .--. . -.. --- ...- . .-. - .... . .-.. .- --.. -.-- -.. --- --."), "THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG")`)
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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 decode_morse(code):
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return code
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```
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# --solutions--
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```py
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def decode_morse(code):
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table = {
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'.-': 'A', '-...': 'B', '-.-.': 'C', '-..': 'D', '.': 'E',
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'..-.': 'F', '--.': 'G', '....': 'H', '..': 'I', '.---': 'J',
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'-.-': 'K', '.-..': 'L', '--': 'M', '-.': 'N', '---': 'O',
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'.--.': 'P', '--.-': 'Q', '.-.': 'R', '...': 'S', '-': 'T',
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'..-': 'U', '...-': 'V', '.--': 'W', '-..-': 'X', '-.--': 'Y',
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'--..': 'Z'
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}
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return ' '.join(
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''.join(table[c] for c in word.split(' '))
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for word in code.split(' ')
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)
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```
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