/**
* Returns array without duplicated values.
* @param {Array} arr
* @returns {Array}
*/
export function unique(arr) {
return arr.filter(function(value, idx, self) {
return self.indexOf(value) === idx;
});
}
/**
* Returns array of strings with all strings converted to lower case.
*
* @param {String[]} arr
* @returns {String[]}
*/
export function arrayToLower(arr) {
return arr.map(Function.prototype.call, String.prototype.toLowerCase);
}