flattenArray

flattenArray.js

//[[1,2,[3]],4] -> [1,2,3,4]
var input = [
    [[1,2,[3]],4]
];
//check if inputArrayItem is an array 
//if yes process inputArrayItem again
//else put in outputArray
var output = [];
function processArray(inputArray) {
    inputArray.forEach(function(inputArrayItem, inputArrayIndex) {
        if (Array.isArray(inputArrayItem))
            processArray(inputArrayItem)
        else
            output.push(inputArrayItem);
    })
}
processArray(input);
//console.log("Input " + input);
//console.log("Output " + output)
//$> node flattenArray.js