Searching for a value inside an array of objects based on a key and returning a sibling's value

Question

I have a key value that I am searching for. Each object has the a key of key for each object in the array. I would like to match the term I am searching for to the value of the key and return the value for the sibling with a key of name.

Here is a sample object:

{
  "test1": {
    "functions": {
      "function1": {
        "inputs": [
          {
            "key": "key1",
            "name": "name1"
          },
          {
            "key": "key2",
            "name": "name3"
          },
          {
            "key": "key3",
            "name": "name3"
          }
        ]
      },
      "function2": {
        "inputs": [
          {
            "key": "key4",
            "name": "name4"
          },
          {
            "key": "key5",
            "name": "name5"
          },
          {
            "key": "key6",
            "name": "name6"
          }
        ]
      }
    }
  }
}

Let's say I want to find the name of an input with a key of key4. How would I achieve this in javascript?

YASH DAVE · Accepted Answer · 2020-08-17 13:10:17Z

2

Is this what you want?

var yourObject = {
  "inputs": [
    {
      "key": "callset_name",
      "name": "Callset Name",
      "type": "STRING",
      "required": false,
      "fromPrevious": false,
      "internalOnly": false
    },
    {
      "key": "reference_genome",
      "name": "Reference Genome",
      "description": "A reference genome.",
      "type": "DATASET",
      "required": true,
      "fromPrevious": false,
      "internalOnly": false,
      "constraints": {
        "dataset": {
          "types": [
            "REFERENCE_GENOME"
          ],
          "components": [
            "bwa_reference_genome"
          ]
        }
      }
    },
    {
      "key": "bam",
      "name": "BAM",
      "type": "FILE",
      "required": true,
      "fromPrevious": true,
      "internalOnly": false,
      "constraints": {
        "file": {
          "types": [
            "BAM"
          ],
          "indexedBy": "bai"
        }
      }
    },
    {
      "key": "bai",
      "name": "BAM Index",
      "type": "FILE",
      "required": true,
      "fromPrevious": true,
      "internalOnly": false,
      "constraints": {
        "file": {
          "types": [
            "BAM_INDEX"
          ]
        }
      }
    },
    {
      "key": "dbsnp_vcf",
      "name": "dbSNP VCF",
      "description": "Single Nucleotide Polymorphism Database",
      "type": "FILE",
      "required": false,
      "fromPrevious": false,
      "internalOnly": false,
      "constraints": {
        "file": {
          "types": [
            "VCF"
          ],
          "indexedBy": "dbsnp_vcf_index"
        }
      }
    },
    {
      "key": "dbsnp_vcf_index",
      "name": "dbSNP VCF Index",
      "description": "Single Nucleotide Polymorphism Database Index",
      "type": "FILE",
      "required": false,
      "fromPrevious": false,
      "internalOnly": false,
      "constraints": {
        "file": {
          "types": [
            "VCF_INDEX",
            "VCF_IDX"
          ]
        }
      }
    }
  ]
};

function getData(key, outputKey) {
  const output = yourObject.inputs.find(data => data.key === key);
  if (output && output.hasOwnProperty(outputKey)) {
    return output[outputKey];
  }
  return;
}

console.log(getData('reference_genome', 'name'));

answered Aug 17, 2020 at 13:10

YASH DAVE

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2 Comments

ACC Over a year ago

Yes thank you! This is in line with what I am searching for. However what if inputs was nested somewhere deeper (and I wouldn't be sure of the exact location) within the object and there were multiple inputs arrays. How would I search for it then? I've edited my original question

YASH DAVE Over a year ago

@ACC YOu can loop through each keys until key is inputs or typeof yout subData is not object

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