Breaking News: Grepper is joining You.com. Read the official announcement!

Joining two arrays with lookup

M M Kamalraj answered on July 3, 2022 Popularity 1/10 Helpfulness 1/10

answer Joining two arrays with lookup

Joining two arrays with lookup

Comment

function join(lookupTable, mainTable, lookupKey, mainKey, select) {
    var l = lookupTable.length,
        m = mainTable.length,
        lookupIndex = [],
        output = [];
    for (var i = 0; i < l; i++) { // loop through l items
        var row = lookupTable[i];
        lookupIndex[row[lookupKey]] = row; // create an index for lookup table
    }
    for (var j = 0; j < m; j++) { // loop through m items
        var y = mainTable[j];
        var x = lookupIndex[y[mainKey]]; // get corresponding row from lookupTable
        output.push(select(y, x)); // select only the columns you need
    }
    return output;
};

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: learnjsdata.com

Tags: arrays javascript lookup

Link to this answer
Share Copy Link

Contributed on Jul 03 2022

M M Kamalraj

0 Answers Avg Quality 2/10

Continue with Google

By continuing, I agree that I have read and agree to Greppers's Terms of Service and Privacy Policy.

Joining two arrays with lookup

Contents

More Related Answers

Joining two arrays with lookup

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.