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83 lines
1.7 KiB
Markdown
83 lines
1.7 KiB
Markdown
---
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id: 69f35a5bb823ed620fcb7cbc
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title: "Challenge 283: String Zipper"
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challengeType: 29
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dashedName: challenge-283
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---
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# --description--
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Given two strings, return a new string that interleaves their characters one at a time. If one string is longer, append the remaining characters at the end.
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Begin with the first character of the first string.
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# --hints--
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`zip_strings("abc", "123")` should return `"a1b2c3"`.
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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(zip_strings("abc", "123"), "a1b2c3")`)
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}})
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```
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`zip_strings("acegikmoqsuwy", "bdfhjlnprtvxz")` should return `"abcdefghijklmnopqrstuvwxyz"`.
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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(zip_strings("acegikmoqsuwy", "bdfhjlnprtvxz"), "abcdefghijklmnopqrstuvwxyz")`)
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}})
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```
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`zip_strings("day", "night")` should return `"dnaiyght"`.
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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(zip_strings("day", "night"), "dnaiyght")`)
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}})
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```
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`zip_strings("python", "javascript")` should return `"pjyatvhaosncript"`.
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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(zip_strings("python", "javascript"), "pjyatvhaosncript")`)
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}})
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```
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`zip_strings("feCdCm", "reoeap")` 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(zip_strings("feCdCm", "reoeap"), "freeCodeCamp")`)
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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 zip_strings(a, b):
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return a
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```
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# --solutions--
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```py
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def zip_strings(a, b):
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result = ""
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for i in range(max(len(a), len(b))):
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if i < len(a):
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result += a[i]
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if i < len(b):
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result += b[i]
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return result
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```
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