hi guys
i have an attribute whit this type of data:
[ { "_id" : "ka5b14ub", "mineralTypeId" : "k5bza8u2", "group" : { "$numberInt" : "3" }, "flloorNo" : { "$numberInt" : "1" }, "wht0003" : { "$numberInt" : "20000000" }, "productionRate" : { "$numberInt" : "2000000" } } ]
i want to cut characters from index 43 to 51.but i face whit this error: string index out of range : -39
can you please help me?