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AND product of arrays in JavaScript
We have an array of arrays of boolean like this −
const arr = [[true,false,false],[false,false,false],[false,false,true]];
We are required to write a function that merges this array of arrays into a one-dimensional array by combining the corresponding elements of each subarray using the AND (&&) operator.
Let’s write the code for this function. We will be using Array.prototype.reduce() function to achieve this.
Example
The code for this will be −
const arr = [[true,false,false],[false,false,false],[false,false,true]];
const andMerge = (arr = []) => {
return arr.reduce((acc, val) => {
val.forEach((bool, ind) => {
acc[ind] = acc[ind] && bool || false;
});
return acc;
}, []);
};
console.log(andMerge(arr));Output
The output in the console will be −
[ false, false, false ]
Updated on: 20-Oct-2020
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