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kdubbels/removeDuplicateWordsInAString.js

Last active August 19, 2020 17:26
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Remove duplicate words in a string
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removeDuplicateWordsInAString.js
// Remove duplicate words in a string
// Uses ES5
function removeDuplicates(str) {
const split = str.split(' ');
const newArray = split.reduce((accumulator, currentValue) => {
if (!accumulator.includes(currentValue)) {
accumulator.push(currentValue);
}
return accumulator;
}, []);
return newArray.join(' ');
}
// one line using ES6
const removeDuplicates2 = str => [... new Set("This is is a test test string".split(' '))].join(' ');
const testString = "This is is a test test string";
removeDuplicates(testString); // "This is a test string"
removeDuplicates2(testString); // "This is a test string"
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