check if is array javascript

1// inside if else check
2if(Array.isArray(myVarToTest)) {
3	// myVatToTest is an array
4} else {
5	// myVarToTest is not an array
6}

1if (typeof array !== 'undefined' && array.length === 0) {
2    // the array is defined and has no elements
3}
4

1Array.isArray(object);

1var colors=["red","green","blue"];
2
3if(Array.isArray(colors)){
4    //colors is an array
5}

1Array.isArray([1, 2, 3]);	// true
2Array.isArray('asdf');		// false

1if(Object.prototype.toString.call(someVar) === '[object Array]') {
2    alert('Array!');
3}
4