javascript array flatten
// flat(depth),
// depth is optional: how deep a nested array structure
// should be flattened.
// default value of depth is 1
const arr1 = [1, 2, [3, 4]];
arr1.flat();
// [1, 2, 3, 4]
const arr2 = [1, 2, [3, 4, [5, 6]]];
arr2.flat();
// [1, 2, 3, 4, [5, 6]]
const arr3 = [1, 2, [3, 4, [5, 6]]];
arr3.flat(2);
// [1, 2, 3, 4, 5, 6]
const arr4 = [1, 2, [3, 4, [5, 6, [7, 8, [9, 10]]]]];
arr4.flat(Infinity);
// [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]javascript array flatten
const flatten = (ary) => ary.reduce((a, b) => a.concat(Array.isArray(b) ? flatten(b) : b), [])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 arrayflatten an array javascript
var arrays = [
["$6"],
["$12"],
["$25"],
["$25"],
["$18"],
["$22"],
["$10"]
];
var merged = [].concat.apply([], arrays);
console.log(merged);flatten an array in javascript
// Although this now may be an older version of how to faltten an
// array of arrays. I still want to post it so some may have an understanding
// of how it works
function falltenArray(arr) {
let result = [...arr];
let flattened = false;
let counter = 0;
while (flattened === false){
// checks to see if the element at the counter index is an array
if (Array.isArray(result[counter])){
// unpacks the current array element back into the array
result.splice(counter, 1, ...result[counter]);
// if so the counter should start at the beginning of the array
counter = 0;
} else {
counter += 1;
}
if (counter === result.length){
flattened = true;
}
}
return result;
}flatten an array in javascript
function flatten(arr) {
const result = []
arr.forEach((i) => {
if (Array.isArray(i)) {
result.push(...flatten(i))
} else {
result.push(i)
}
})
return result
}
// Usage
const nested = [1, 2, 3, [4, 5, [6, 7], 8, 9]]
flatten(nested) // [1, 2, 3, 4, 5, 6, 7, 8, 9]Copyright © 2021 Codeinu
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