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102 lines
2.4 KiB
Markdown
102 lines
2.4 KiB
Markdown
---
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id: 6925e2068081f40f549ced1b
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title: "Challenge 137: Snowflake Generator"
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challengeType: 29
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dashedName: challenge-137
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---
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# --description--
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Given a multi-line string that uses newline characters (`\n`) to represent a line break, return a new string where each line is mirrored horizontally and attached to the end of the original line.
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- Mirror a line by reversing all of its characters, including spaces.
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For example, given `"* \n *\n* "`, which logs to the console as:
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```sh
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*
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*
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*
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```
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Return `"* *\n ** \n* *"`, which logs to the console as:
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```sh
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* *
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**
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* *
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```
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Take careful note of the whitespaces in the given and returned strings. Be sure not to trim any of them.
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# --hints--
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`generate_snowflake("* \n *\n* ")` should return `"* *\n ** \n* *"`.
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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(generate_snowflake("* \\n *\\n* "), "* *\\n ** \\n* *")`)
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}})
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```
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`generate_snowflake("X=~")` should return `"X=~~=X"`.
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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(generate_snowflake("X=~"), "X=~~=X")`)
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}})
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```
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`generate_snowflake(" X \n v \nX--=\n ^ \n X ")` should return `" X X \n v v \nX--==--X\n ^ ^ \n X X "`.
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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(generate_snowflake(" X \\n v \\nX--=\\n ^ \\n X "), " X X \\n v v \\nX--==--X\\n ^ ^ \\n X X ")`)
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}})
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```
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`generate_snowflake("* *\n * * \n* * *\n * * \n* *")` should return `"* ** *\n * * * * \n* * ** * *\n * * * * \n* ** *"`.
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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(generate_snowflake("* *\\n * * \\n* * *\\n * * \\n* *"), "* ** *\\n * * * * \\n* * ** * *\\n * * * * \\n* ** *")`)
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}})
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```
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`generate_snowflake("* -\n * -\n* -")` should return `"* -- *\n * -- * \n* -- *"`.
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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(generate_snowflake("* -\\n * -\\n* -"), "* -- *\\n * -- * \\n* -- *")`)
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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 generate_snowflake(crystals):
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return crystals
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```
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# --solutions--
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```py
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def generate_snowflake(crystals):
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lines = crystals.split("\n")
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mirrored = []
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for line in lines:
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reversed_line = line[::-1]
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mirrored.append(line + reversed_line)
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return "\n".join(mirrored)
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```
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