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//获取字符串+1 exports.getStringAddOne= (value,len) => { let cn=value; let pcn=cn.substr(0,cn.length-len); let str=cn.substr(cn.length-len,len); let vn=String(Number(1+str)+1) ; let sn=pcn+vn.substr(vn.length-len,len); return sn; };
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