29 lines
801 B
JavaScript
29 lines
801 B
JavaScript
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/**
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* Returns an object with items grouped by the sent key.
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*
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* @param {Array} array array of objects.
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* @param {string} key the object prop that will be used to group elements.
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* @param {string} defaultKey if the key is not found in the object, it will use this value.
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* @return {Object} Object that contains the grouped elements.
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*/
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export const groupListOfObjectsBy = (
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array,
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key,
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defaultKey = 'undefined'
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) => {
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if ( array && Array.isArray( array ) && array.length ) {
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if ( ! key ) {
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return array;
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}
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return array.reduce( ( result, currentValue ) => {
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if ( ! currentValue[ key ] ) {
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currentValue[ key ] = defaultKey;
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}
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( result[ currentValue[ key ] ] =
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result[ currentValue[ key ] ] || [] ).push( currentValue );
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return result;
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}, {} );
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}
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return {};
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};
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