node js typeof array code example
Example 1: validate array javascript
Array.isArray([1, 2, 3]); // true
Array.isArray({foo: 123}); // false
Array.isArray('foobar'); // false
Array.isArray(undefined); // false
Example 2: javascript check if is array
var colors=["red","green","blue"];
if(Array.isArray(colors)){
//colors is an array
}
Example 3: js check if array
Array.isArray([1, 2, 3]); // true
Array.isArray('asdf'); // false
Example 4: javascript check if array is in array
var array = [1, 3],
prizes = [[1, 3], [1, 4]],
includes = prizes.some(a => array.every((v, i) => v === a[i]));
console.log(includes);