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91 lines
2.2 KiB
Markdown
91 lines
2.2 KiB
Markdown
---
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id: 698a1a73ade5ac0e19180fa5
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title: "Challenge 202: Add Punctuation"
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challengeType: 29
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dashedName: challenge-202
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---
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# --description--
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Given a string of sentences with missing periods, add a period (`"."`) in the following places:
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- Before each space that comes immediately before an uppercase letter
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- And at the end of the string
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Return the resulting string.
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# --hints--
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`add_punctuation("Hello world")` 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(add_punctuation("Hello world"), "Hello world.")`)
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}})
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```
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`add_punctuation("Hello world It's nice today")` should return `"Hello world. It's nice today."`
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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(add_punctuation("Hello world It's nice today"), "Hello world. It's nice today.")`)
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}})
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```
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`add_punctuation("JavaScript is great Sometimes")` should return `"JavaScript is great. Sometimes."`
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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(add_punctuation("JavaScript is great Sometimes"), "JavaScript is great. Sometimes.")`)
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}})
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```
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`add_punctuation("A b c D e F g h I J k L m n o P Q r S t U v w X Y Z")` should return `"A b c. D e. F g h. I. J k. L m n o. P. Q r. S t. U v w. X. Y. 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(add_punctuation("A b c D e F g h I J k L m n o P Q r S t U v w X Y Z"), "A b c. D e. F g h. I. J k. L m n o. P. Q r. S t. U v w. X. Y. Z.")`)
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}})
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```
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`add_punctuation("Wait.. For it")` should return `"Wait... For it."`
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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(add_punctuation("Wait.. For it"), "Wait... For it.")`)
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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 add_punctuation(sentences):
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return sentences
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```
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# --solutions--
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```py
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def add_punctuation(sentences):
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result = ""
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length = len(sentences)
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for i, c in enumerate(sentences):
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if c == " " and i + 1 < length and sentences[i + 1].isupper():
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result += "."
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result += c
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if not result.endswith("."):
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result += "."
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return result
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```
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