reverse() is not a function

user_4232472 0
Viewed 14832

Hello i within javascript a function to calculate the stock of our ticket system. As input i get the following input:

[{key:"10-09-2017", value:{countCreatedTickets: 98, countOpenTickets: 13, countSolvedTickets: 61}},
 {key:"12-09-2017", value:{countCreatedTickets:51,  countOpenTickets: 14, countSolvedTickets: 33}}
]

The function as i used is:

function funnelCalulation(ds){
    var stock = 0, stockCalulations = []
    console.info('-------  funnelCalulation -------')
    console.info(ds)
    ds = ds.reverse()

    for(var i = 0; i < ds.length; i++ ){
        if (i == 0){
            stock = ( ds[i].value.countCreatedTickets + ds[i].value.countOpenTickets ) - ds[i].value.countSolvedTickets
            stockCalulations.push({datum: ds[i].key, createdTickets: ds[i].value.countCreatedTickets, opentTickets: ds[i].value.countOpenTickets, ticketStock: stock })

        }
        if (i > 0){
            stock = ( ds[i].value.countCreatedTickets + ds[i].value.countOpenTickets + stock ) - ds[i].value.countSolvedTickets
            stockCalulations.push({datum:ds[i].key, createdTickets: ds[i].value.countCreatedTickets, opentTickets: ds[i].value.countOpenTickets, ticketStock: stock })
        }
    }

    return stockCalulations[ds.length-1]
}

I called the function as followed:

var stockValues = funnelCalulation(values)
            console.info('  ---- > stockValues  <--------')
            console.info(stockValues)

console.info(ds) returns the following output: enter image description here

and if i type typeof ds it returns that is a object. The result is the function works correct but when returning the value gives the following error back:

ticketsGraphs.js:49 Uncaught TypeError: ds.reverse is not a function
    at funnelCalulation (ticketsGraphs.js:49)
    at Object.success (createWidgets.js:121)
    at i (jquery-3.2.1.min.js:2)
    at Object.fireWith [as resolveWith] (jquery-3.2.1.min.js:2)
    at A (jquery-3.2.1.min.js:4)
    at XMLHttpRequest.<anonymous> (jquery-3.2.1.min.js:4)

I put the complete code in the jsfilde below:

https://jsfiddle.net/Erik_Hoeven/Lahuc4oe/

sorting arrays javascript
1 Answers

You need to pass .reverse() an array. 

 function funnelCalulation(ds){
        var stock = 0, stockCalulations = []
        console.info('-------  funnelCalulation -------')
        console.info(ds)
        ds = ds.toString().split('').reverse().join('')

        for(var i = 0; i < ds.length; i++ ){
            if (i == 0){
                stock = ( ds[i].value.countCreatedTickets + ds[i].value.countOpenTickets ) - ds[i].value.countSolvedTickets
                stockCalulations.push({datum: ds[i].key, createdTickets: ds[i].value.countCreatedTickets, opentTickets: ds[i].value.countOpenTickets, ticketStock: stock })

            }
            if (i > 0){
                stock = ( ds[i].value.countCreatedTickets + ds[i].value.countOpenTickets + stock ) - ds[i].value.countSolvedTickets
                stockCalulations.push({datum:ds[i].key, createdTickets: ds[i].value.countCreatedTickets, opentTickets: ds[i].value.countOpenTickets, ticketStock: stock })
            }
        }

        return stockCalulations[ds.length-1]
    }
user_125388290
Related