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p0o/addToSet.js

Created September 26, 2016 13:52
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Adding item to a List[] Using Set() data structure and returning a serializable array - To be used in JSON state managers like Redux
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addToSet.js
/**
* Adding item to a List[] Using Set() data structure and returning a serializable array
* @param {String} newItem to be added
* @param {Array} list of current array
* @returns {Array} New item added without repetition
*/
const addToSet = (newItem, list) => {
const itemsSet = new Set();
const newList = [];
list.forEach(listItem => itemsSet.add(listItem));
itemsSet.add(newItem);
itemsSet.forEach(item => newList.push(item));
return newList;
};
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