flattening of array code example

Example 1: flatten an array javascript

var arrays = [
  ["$6"],
  ["$12"],
  ["$25"],
  ["$25"],
  ["$18"],
  ["$22"],
  ["$10"]
];
var merged = [].concat.apply([], arrays);

console.log(merged);

Example 2: flatten array object javascript

var flattenArray = function(data) {
	return data.reduce(function iter(r, a) {
		if (a === null) {
			return r;
		}
		if (Array.isArray(a)) {
			return a.reduce(iter, r);
		}
		if (typeof a === 'object') {
			return Object.keys(a).map(k => a[k]).reduce(iter, r);
		}
		return r.concat(a);
	}, []);
}
console.log(flattenArray(data))

//replace data with your array

Example 3: Javascript flatten array of arrays

var multiDimensionArray = [["a"],["b","c"],["d"]]; //array of arrays
var flatArray = Array.prototype.concat.apply([], multiDimensionArray); //flatten array of arrays
console.log(flatArray); // [ "a","b","c","d"];