字符串转数组

var a='apple,pear,orange'
var b=a.split(',')
console.log(b)
var a='apple,pear,orange'
var b=Array.from(a)
console.log(b)
//["a", "p", "p", "l", "e", ",", "p", "e", "a", "r", ",", "o", "r", "a", "n", "g", "e"]

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