You should use the angular.isArray method instead of the default JavaScript implementation (typeof [] === "[object Array]").
Rule based on Angular 1.x
The following patterns are considered problems;
/*eslint angular/typecheck-array: 2*/
// invalid
Object.prototype.toString.call(someArray) === '[object Array]'; // error: You should use the angular.isArray method
// invalid
Array.isArray(someArray) // error: You should use the angular.isArray method
The following patterns are not considered problems;
/*eslint angular/typecheck-array: 2*/
// valid
angular.isArray(someArray);
This rule was introduced in eslint-plugin-angular 0.1.0