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041918d7b7
* docs: update the js doc * pref: Optimize algo via regex ignore the useless traverse in best case via regex and String.prototype.replace * test: add some new test cases * fix: styled with standard * refactor: remove useless variable
24 lines
557 B
JavaScript
24 lines
557 B
JavaScript
/**
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* @function lower
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* @description Will convert the entire string to lowercase letters.
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* @param {String} str - The input string
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* @returns {String} Lowercase string
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* @example lower("HELLO") => hello
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* @example lower("He_llo") => he_llo
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*/
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const lower = (str) => {
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if (typeof str !== 'string') {
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throw new TypeError('Invalid Input Type')
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}
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return str
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.replace(/[A-Z]/g, (_, indexOfUpperChar) => {
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const asciiCode = str.charCodeAt(indexOfUpperChar)
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return String.fromCharCode(asciiCode + 32)
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})
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}
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export { lower }
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