Multi tool use

Clash Royale CLAN TAG

Getting null value using map in Rails

I am getting null value when I am using if condition inside a map. I have an array and I looping through that.

My first array is:

[
{
id: 5,
Vegetables: "Cabbage",
Area: 39,
Production: 695.33,
Year: 2014,
created_at: "2018-07-18T06:23:11.000Z",
updated_at: "2018-07-18T06:23:11.000Z"
},
{
id: 12,
Vegetables: "Bittergourd",
Area: 9.71,
Production: 67.25,
Year: 2014,
created_at: "2018-07-18T06:23:11.000Z",
updated_at: "2018-07-18T06:23:11.000Z"
},
.....
]


This is my array and and I using this code to loop:

ji1 = ["Cabbage","Bittergourd"]
hash_data = ji1.map do |col|

dataset = col.to_s.gsub("_"," ")
{
type:views,
legendText: dataset,
showInLegend: true,
dataPoints: b.reject{|x| x["Districts"]== "Bihar"}.map do |el|
if el["Vegetables"] == "Bittergourd"
{ y: el["Area"], label: el["Year"] }
end
end
}
end


In this example b is my array I am getting this value. I want a result like this:

[
{
type: "column",
legendText: "Cabbage",
showInLegend: true,
dataPoints: [
{
y: 9.7,
label: 2014
}



]
},
{
type: "column",
legendText: "Bittergourd",
showInLegend: true,
dataPoints: [
{
y: 39,
label: 2014
}

.....

]
}
]


When I am running my loop I am getting null value is there any way I can create a result like above using map function with my array.

view

type:views

1 Answer
1

Being 'b' the data you provided, and removing views since I don't know where that variable comes from... try this piece of code. I believe it achieves what you are trying to do

grouped_data = b.group_by{ |data| data[:Vegetables]}

grouped_data.map{ |vegetable, values|
dataset = vegetable.to_s.gsub("_"," ")
{

legendText: dataset,
showInLegend: true,
dataPoints: values.map { |value|
{ y: value[:Area], label: value[:Year] }
}
}
}


By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.