What is the best way to form a Hashtable in JavaScript using a JSON object where the value serves as the key?

Question

What is the best way to form a Hashtable in JavaScript using a JSON object where the value serves as the key?

Forgive me if this seems unclear, but I am trying to locate specific values within each JSON object and retrieve another value based on it. I have been advised to consider using a Hash Table for this purpose, however, I am unsure of how to proceed. For instance:

{
    "form_key" : "basicPatientName",
    "data" : "Miranda Jones",
    "cid" : 2,
    "pid" : 1,
    "no" : "0"
}

I aim to search for basicPatientName and extract Miranda Jones, or search for basicPatientgender and extract 1.
I have utilized a library named DefiantJS which allows me to iterate through my JSON easily and accomplish what I need. However, I have been warned about the excessive number of iterations involved if I were to perform this task more than 1000 times in the same program.

javascript json hashtable

Answer 1

Answer №1

Here is a code snippet that you can use:

sampleData = [{
    "form_key" : "basicPatientName",
    "data" : "John Doe",
    "cid" : 2,
    "pid" : 1,
    "no" : "0"
},
{
    "form_key" : "basicPatientAge",
    "data" : "25",
    "cid" : 4,
    "pid" : 1,
    "no" : "0"
}
];

var info = {};
sampleData.forEach(function (record) {
    info[record.form_key] = record.data;
});

// display information
console.log(info);

// Example of accessing data:
var name = info.basicPatientName; //  = John Doe

Answer 2

Here is a code snippet that you can use:

sampleData = [{
    "form_key" : "basicPatientName",
    "data" : "John Doe",
    "cid" : 2,
    "pid" : 1,
    "no" : "0"
},
{
    "form_key" : "basicPatientAge",
    "data" : "25",
    "cid" : 4,
    "pid" : 1,
    "no" : "0"
}
];

var info = {};
sampleData.forEach(function (record) {
    info[record.form_key] = record.data;
});

// display information
console.log(info);

// Example of accessing data:
var name = info.basicPatientName; //  = John Doe

What is the best way to form a Hashtable in JavaScript using a JSON object where the value serves as the key?

Answer №1

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