I am working on a D3.JS chart using an array named "dataset" where each entry is an object with a key and value attributes, such as the following:
dataset=
[
{"key":"alpha", "value": [ {}, { } ...]},
{"key":"beta", "value": [ { }, { } ...]},
{"key":"gamma", "value": [ {}, { } ...]},
{"key":"delta", "value": [ { }, { } ...]}
];
I need to extract one of those objects to create a new array. I have tried the following:
filteredDataset = dataset.filter(function(d){ console.log("d",d); if(d.key === "gamma") return d});
I can see in the console that I am accessing each object in the dataset, but the resulting filteredDataset comes out empty. What am I doing wrong?
For clarity filter should be used by returning a boolean:
Like:
filteredDataset = dataset.filter(function(d){ return d.key === "gamma"})
And on my end the code
var dataset = [
{"key":"alpha", "value": [ {}, { }]},
{"key":"beta", "value": [ { }, { }]},
{"key":"gamma", "value": [ {}, { }]},
{"key":"delta", "value": [ { }, { }]}
];
filteredDataset = dataset.filter(function(d){ return d.key === "gamma"})
Outputs:
[ { key: 'gamma', value: [ {}, {} ] } ]
So please double check your code
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