SOURCE

let imageName = 'cbtmmprice'
let userID = 't03'

let matchReg = '^' + imageName + '-' + userID.toLowerCase() + '(-\\d+)?\\b'
let maxNum = 0
let newInstanceID = `${imageName}-${userID}`

const f1 = function(rsData){
    for(let elem of rsData) {   
        let x = elem.InstanceID.match(matchReg)
        console.log(x)
        //不为null，即符合正则匹配
        if (x !== null) {
            //策略实例格式：`${imageName}-${cdata.UserID}`+数字序号
            if (x[1] !== undefined) {
                let tempNum = Number(x[1].slice(1))
                maxNum = Math.max(maxNum, tempNum)
                //策略实例格式：`${selectImageName}-${cdata.UserID}`
                newInstanceID = `${imageName}-${userID}-${maxNum + 1}`
            }
        }
    }
}

let rsData=[{InstanceID:'cbtmmprice-t03'}]
f1(rsData)

console.log(newInstanceID)