javascript - Merge/flatten an array of arrays

Question

I have a JavaScript array like:

[["$6"], ["$12"], ["$25"], ["$25"], ["$18"], ["$22"], ["$10"]]

How would I go about merging the separate inner arrays into one like:

["$6", "$12", "$25", ...]

question from:https://stackoverflow.com/questions/65893513/i-need-to-return-a-1-dimensional-array-on-the-console-from-a-2-dimensional-array

Answer 1

You can use concat to merge arrays:

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

console.log(merged);