substr
var s = 'abcd'
var res = s.substr(0,s.length-1) //从索引0开始,截取s.length-1个字符
console.log(res)
substring
var s = 'abcd'
var res = s.substring(0,s.length-1) //从索引0开始,截取至索引下标为s.length-1的字符,包左不包右
console.log(res)
微信扫一扫
var s = 'abcd'
var res = s.substr(0,s.length-1) //从索引0开始,截取s.length-1个字符
console.log(res)
var s = 'abcd'
var res = s.substring(0,s.length-1) //从索引0开始,截取至索引下标为s.length-1的字符,包左不包右
console.log(res)
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