活版印字

var _ = require('lodash');

const USER = ['id', 'firstname', 'lastname', 'fullname'];
let USER2 = USER;
_.pull(USER2, 'fullname')
console.log(USER);
console.log(USER2);

const TEACHER = ['id', 'firstname', 'lastname', 'fullname'];
let TEACHER2 = _.cloneDeep(TEACHER);
_.pull(TEACHER2, 'fullname')
console.log(TEACHER);
console.log(TEACHER2);

=== output ===

[ 'id', 'firstname', 'lastname' ]
[ 'id', 'firstname', 'lastname' ]
[ 'id', 'firstname', 'lastname', 'fullname' ]
[ 'id', 'firstname', 'lastname' ]