Hands-On Data Structures and Algorithms with JavaScript

Predicting outcome of sample inputs

Now that our tree is ready and returned, we can use this in our app.component to determine whether the prediction matches that of the expected outcome using the predict() method:

public predict(tree, input) {    var node = tree;    // loop over the entire tree    while(!node[0].leaf){        // take node name e.g. creditScore        var name = node[0].name;        // take value from input sample        var inputValue = input[name];        // check if branches for given input exist        var childNode = filter(node[0].branches, ['name', inputValue]);        // if branches exist return branches or default to No        node = childNode.length ?            childNode[0].branches : [{ leaf: true, value: 'No'}];    }    // return final leaf value    return node[0].value;}

Then, in the app.component ...