/
flatten.js
43 lines (39 loc) · 1.14 KB
/
flatten.js
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const eqArrays = function(arr1, arr2) {
if (arr1.length !== arr2.length) {
return false;
} else {
for (let i = 0; i < arr1.length; i++) {
if (arr1[i] !== arr2[i]) {
return false;
}
}
}
return true;
};
let assertArraysEqual = function(actual, expected) {
const result = eqArrays(actual, expected);
if (result === true) {
console.log(`✅✅✅ Assertion Passed: ${actual} === ${expected}`);
} else {
console.log(`🛑🛑🛑 Assertion Failed: ${actual} !== ${expected}`);
}
};
//Create a function flatten which will take in an array of arrays and return a "flattened" version of the array.
const flatten = function(arr1) {
let result = [];
for (let i = 0; i < arr1.length; i++) {
const currentItem = arr1[i];
if (Array.isArray(currentItem)) {
result = result.concat(currentItem); //this is another solution array.concat
/*
for (let x = 0; x < currentItem.length; x++) {
result.push(currentItem[x])
}*/
} else {
result.push(currentItem);
}
}
return result;
};
//return an array
console.log(flatten([1, 2, [3, 4], 5, [6]])); // => [1, 2, 3, 4, 5, 6]