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117 lines
2.8 KiB
Markdown
117 lines
2.8 KiB
Markdown
---
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id: 68ffb91507a5b645769328c4
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title: "Challenge 101: Markdown Heading Converter"
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challengeType: 29
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dashedName: challenge-101
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---
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# --description--
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Given a string representing a Markdown heading, return the equivalent HTML heading.
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A valid Markdown heading must:
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- Start with zero or more spaces, followed by
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- 1 to 6 hash characters (`#`) in a row, then
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- At least one space. And finally,
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- The heading text.
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The number of hash symbols determines the heading level. For example, one hash symbol corresponds to an `h1` tag, and six hash symbols correspond to an `h6` tag.
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If the given string doesn't have the exact format above, return `"Invalid format"`.
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For example, given `"# My level 1 heading"`, return `"<h1>My level 1 heading</h1>"`.
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Note: The console may not display HTML tags in strings when logging messages. Check the browser console to see logs with tags included.
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# --hints--
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`convert("# My level 1 heading")` should return `"<h1>My level 1 heading</h1>"`.
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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(convert("# My level 1 heading"), "<h1>My level 1 heading</h1>")`)
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}})
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```
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`convert("My heading")` should return `"Invalid format"`.
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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(convert("My heading"), "Invalid format")`)
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}})
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```
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`convert("##### My level 5 heading")` should return `"<h5>My level 5 heading</h5>"`.
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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(convert("##### My level 5 heading"), "<h5>My level 5 heading</h5>")`)
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}})
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```
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`convert("#My heading")` should return `"Invalid format"`.
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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(convert("#My heading"), "Invalid format")`)
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}})
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```
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`convert(" ### My level 3 heading")` should return `"<h3>My level 3 heading</h3>"`.
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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(convert(" ### My level 3 heading"), "<h3>My level 3 heading</h3>")`)
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}})
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```
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`convert("####### My level 7 heading")` should return `"Invalid format"`.
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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(convert("####### My level 7 heading"), "Invalid format")`)
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}})
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```
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`convert("## My #2 heading")` should return `"<h2>My #2 heading</h2>"`.
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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(convert("## My #2 heading"), "<h2>My #2 heading</h2>")`)
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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 convert(heading):
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return heading
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```
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# --solutions--
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```py
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import re
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def convert(heading):
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trimmed = heading.strip()
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if not re.match(r'^#{1,6}\s+\S+', trimmed):
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return "Invalid format"
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hash_count = trimmed.find(' ')
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text = trimmed[hash_count:].lstrip()
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return f"<h{hash_count}>{text}</h{hash_count}>"
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```
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