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654c824fdd
Could throw an error instead, but to be consistent with other case conversion functions in this collection, it returns an empty string when input is empty string.
47 lines
2.2 KiB
JavaScript
47 lines
2.2 KiB
JavaScript
/*
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Problem statement and Explanation : https://www.codeproject.com/Tips/162540/Letter-Case-Conversion-Algorithms-Title-Case-Toggl.
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[Title case](https://en.wikipedia.org/wiki/Title_case) is a style where all words are capitalized. Officially, title case
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does not capitalize some words, such as very short words like "a" or "is", but for the purposes of this function, a general approach
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is taken where all words are capitalized regarless of length.
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*/
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/**
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* The titleCaseConversion function converts a string into a title case string.
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* @param {string} inputString The input string which can have any types of letter casing.
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* @returns {string} A string that is in title case.
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*/
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const titleCaseConversion = (inputString) => {
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if (inputString === '') return ''
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// Extact all space seprated string.
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const stringCollections = inputString.split(' ').map(word => {
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let firstChar = ''
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// Get the [ASCII](https://en.wikipedia.org/wiki/ASCII) character code by the use charCodeAt method.
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const firstCharCode = word[0].charCodeAt()
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// If the ASCII character code lies between 97 to 122 it means they are in the lowercase so convert it.
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if (firstCharCode >= 97 && firstCharCode <= 122) {
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// Convert the case by use of the above explanation.
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firstChar += String.fromCharCode(firstCharCode - 32)
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} else {
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// Else store the characters without any modification.
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firstChar += word[0]
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}
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const newWordChar = word.slice(1).split('').map(char => {
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// Get the ASCII character code by the use charCodeAt method.
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const presentCharCode = char.charCodeAt()
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// If the ASCII character code lies between 65 to 90, it means they are in the uppercase so convert it.
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if (presentCharCode >= 65 && presentCharCode <= 90) {
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// Convert the case by use of the above explanation.
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return String.fromCharCode(presentCharCode + 32)
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}
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// Else return the characters without any modification.
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return char
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})
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// Return the first converted character and remaining character string.
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return firstChar + newWordChar.join('')
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})
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// Convert all words in a string and return it.
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return stringCollections.join(' ')
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}
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export { titleCaseConversion }
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