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Added AlternativeStringArrange method in string category. #657

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Merged
raklaptudirm merged 5 commits into from
Aug 19, 2021
Merged

Added AlternativeStringArrange method in string category. #657

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6893c4f
add AlternativeStringArrange method in string category
suryapratapsinghsuryavanshi Aug 18, 2021
29fee5f
add new line at the end of the file
suryapratapsinghsuryavanshi Aug 18, 2021
fd71eff
re-formate the code
suryapratapsinghsuryavanshi Aug 18, 2021
713ab61
add problem source and explanation reference
suryapratapsinghsuryavanshi Aug 18, 2021
ae74e6b
reformatted the code with the standard.js code style
suryapratapsinghsuryavanshi Aug 18, 2021
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44 changes: 44 additions & 0 deletions String/AlternativeStringArrange.js
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Original file line number Diff line number Diff line change
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// Alternative arrange the two given strings in one string in O(n) time complexity.

// Problem Source & Explanation: https://www.geeksforgeeks.org/alternatively-merge-two-strings-in-java/

/**
* Alternative arrange the two given strings in one string in O(n) time complexity.
* @param {String} str1 first input string
* @param {String} str2 second input string
* @returns `String` return one alternative arrange string.
*/
const AlternativeStringArrange = (str1, str2) => {
// firstly, check that both inputs are strings.
if (typeof str1 !== 'string' || typeof str2 !== 'string') {
return 'Not string(s)'
}

// output string vlaue.
let outStr = ''

// get first string length.
const firstStringLength = str1.length
// get second string length.
const secondStringLength = str2.length
// absolute length for oparetion.
const absLenght = firstStringLength > secondStringLength ? firstStringLength : secondStringLength

// Iterate the character count until the absolute count is reached.
for (let charCount = 0; charCount < absLenght; charCount++) {
// If firstStringLength is lesser than the charCount it means they are able to re-arange.
if (charCount < firstStringLength) {
outStr += str1[charCount]
}

// If secondStringLength is lesser than the charCount it means they are able to re-arange.
if (charCount < secondStringLength) {
outStr += str2[charCount]
}
}

// return the output string.
return outStr
}

module.exports = AlternativeStringArrange