字符串转数组split() 数组转字符串join()

字符串转数组方法 split()

'a,b,c'.split('')
(5) ['a', ',', 'b', ',', 'c']
'a,b,c'.split(',')
(3) ['a', 'b', 'c']
'a,b,c'.split()
['a,b,c']

数组转字符串 join()

var arr = ['apple','banana']

arr.join('and') => 'apple and banana'