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30 lines (26 loc) · 840 Bytes
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/**
* @function checkWordOccurrence
* @description - this function count all the words in a sentence and return an word occurrence object
* @param {string} str
* @param {boolean} isCaseSensitive
* @returns {Object}
*/
constcheckWordOccurrence=(str,isCaseSensitive=false)=>{
if(typeofstr!=='string'){
thrownewTypeError('The first param should be a string')
}
if(typeofisCaseSensitive!=='boolean'){
thrownewTypeError('The second param should be a boolean')
}
constmodifiedStr=isCaseSensitive ? str.toLowerCase() : str
returnmodifiedStr
.split(/\s+/)// remove all spaces and distribute all word in List
.reduce(
(occurrence,word)=>{
occurrence[word]=occurrence[word]+1||1
returnoccurrence
},
{}
)
}
export{checkWordOccurrence}