Let's consider an example array:
var myArray = [
[1,2,3],
[4,5,6],
[7,8,9,10],
[[11,12],[13,14,15]]];
for (var i = 0; i < myArray.length; i++){
for(var j = 0; j < myArray[i].length; j++){
for(var k = 0; k < myArray[i][j].length; k++){
console.log(myArray[i],[j][k]);
}
}
}
However, the output only shows 11, 12, 13, 14, and 15. I aim to print all values in the array. Can someone please suggest a solution? Thank you in advance.
One way to flatten arrays in JavaScript is by using Array.prototype.flat(). For example, calling .flat(2) will flatten the array to a depth of 2.
var myArray = [
[1,2,3],
[4,5,6],
[7,8,9,10],
[[11,12],[13,14,15]]];
console.log(myArray.flat(2));
To tackle nested arrays, you can implement a recursive function in JavaScript. Start by passing the entire array to the function. Then, iterate through each element of the array and determine if it's an array or a digit. If it's an array, call the same function recursively with only that specific element as input. If it's a digit, simply print it out.
This approach is effective even when you're uncertain about the number of nested arrays present, otherwise consider using MWO's solution.
var myArray = [
[1,2,3],
[4,5,6],
[7,8,9,10],
[[11,12],[13,14,15]]];
function printArray(arr){
for(var i = 0; i < arr.length; i++){
if(Array.isArray(arr[i])){
printArray(arr[i]);
}else{
console.log(arr[i]);
}
}
}
printArray(myArray);This function is designed to flatten any multi-dimensional array by utilizing the power of recursion.
var myArray = [1,2,33,44, [1,2,3], [[11,12],[13,14,15]]];
var myArray1 = [1,2,33,44, [[11,12],[13,14,15]]];
var deepFlattenArray = function (array){
var result = [];
array.forEach(function (element) {
if (Array.isArray(element)) {
result = result.concat(deepFlattenArray(element));
} else {
result.push(element);
}
});
return result;
};
console.log(deepFlattenArray(myArray));
// output = [ 1, 2, 33, 44, 1, 2, 3, 11, 12, 13, 14, 15]
console.log(deepFlattenArray(myArray1));
// output = [1, 2, 33, 44, 11, 12, 13, 14, 15 ]
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