lightweight
lightweight

Reputation: 3327

getting the array length the same across all objects

I have a data object that looks like this:

 [
  {
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    "values": [
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        "key": "Both", 
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          }, 
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    ]
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  {
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  }
]

I need to ensure that the length of the key, values arrays are the same so I can plot them on a stackedAreaChart using nvd3 since there are two conditions that I need to follow...

  1. Series should have the same time scale (range).
  2. Series length, i.e. 'values' array length should be the same across all objects in data.

I tried following this fidde: http://jsfiddle.net/krispo1/nR6qN/2/

by doing this in the controller:

get_scn_cst_data().then(function(costByScn){

                var data2 = []

                for(i = 0; i < costByScn.length; i++) {
                    console.log("i:", JSON.stringify(costByScn[i].values))
                    var data = costByScn[i].values;

                    if(data && Array.isArray(data)) { 
                            console.log("is array")
                            }

                    data = data.map(function(series){
                              series.values = series.values.map(function(d,i){
                                  return [data[2].values[i][0], d[1]]
                              })
                              return series;
                          });

                }

                console.log("data2: ", JSON.stringify(costByScn));

                $scope.data_costByScn =   costByScn;

})

but got this error: TypeError: data.map is not a function

----EDIT-----

made changes to fix the array but now getting this error at Cannot read property 'values' of undefined at this part:

                data = data.map(function(series){
                          series.values = series.values.map(function(d,i){
                              return [data[2].values[i][0], d[1]]
                          })
                          return series;
                      });

why does values come back undefined? when I console log data, it looks to be an array with values

Upvotes: 0

Views: 54

Answers (1)

hadi
hadi

Reputation: 21

simply the type error means you are trying to invoking .map on something which is not an array!

before sending that data to the .map verify it to be a valid array

you can use :if(data && Array.isArray(data)) { // your login goes here... }

Upvotes: 2

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