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iddan/insert.jsx

Created January 8, 2017 15:50
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insert to document collection with unique ids
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insert.jsx
/**
* Insert documents to a document collection with unique ids. Override if exists.
* @param {array} state
* @param {array} newState
* @param {string} id
*/
function insert(state, newState, id) {
let ids = newState.reduce((ids, item) => ({ ...ids, [item[id]]: true }), {});
return [...state.filter(item => !ids[item[id]]), ...newState];
}
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