array1 = array1.filter(function(val) {return array2.indexOf(val) == -1;});或者,随着ES6的推出:
array1 = array1.filter(val => !array2.includes(val));

array1 = array1.filter(function(val) {return array2.indexOf(val) == -1;});或者,随着ES6的推出:
array1 = array1.filter(val => !array2.includes(val));