d2-ui
Version:
40 lines (36 loc) • 1.16 kB
JavaScript
/**
* Creates an array of unique values from the array passed. This function does not do a _deep_ compare.
* Objects with the same values will therefore not be filtered.
*
* @param {Array} array The array to create the array of uniques from
* @returns {Array} The array containing the unique values
*
* @throws {TypeError} Is thrown when the argument passed is not an `array`
*
* @example
* const sourceArray = [1, 1, 2, 3, 2, 4, 4, 3];
* arrayUnique(sourceArray); // returns: [1, 2, 3, 4]
*
* @example
* const A = {name: 'A'};
* const B = {name: 'B'};
* arrayUnique([A, A, B, B]); // Returns: [{name: 'A'}, {name: 'B'}]
*
* @example
* const sourceArray = [{name: 'A'}, {name: 'B'}, {name: 'B'}];
* arrayUnique(sourceArray); // Returns: [{name: 'A'}, {name: 'B'}, {name: 'B'}]
*/
export default function arrayUnique(array) {
// TODO: Could be written as `return [...(new Set(array))];`
var newArray = [];
var i = 0;
var len = array.length;
var item;
for (; i < len; i++) {
item = array[i];
if (newArray.indexOf(item) === -1) {
newArray.push(item);
}
}
return newArray;
}