Exploring the concept of recursive method calls in TypeScript

I am trying to call the filterArr method inside the filterArr itself. Here is my current implementation:

 function filterArr(array, search) {
        var result = [];
        array.forEach((a)=> {
            var temp = [],
                 o = {},
                found = false;

            if (a.name === search) {
                o.name = a.name;
                found = true;
            }
            if (Array.isArray(a.children)) {
                temp = filterArr(a.children, search); //***Cannot read property 'filterArr' of undefined***
                if (temp.length) {
                    o.children = temp;
                    found = true;
                }
            }
            if (found) {
                result.push(o);
            }
        });
        return result;
    }

What is the solution to call the filterArr method without encountering any errors?

Answer №1

In order to correctly access `this`, it is necessary to utilize an Arrow function. Therefore, you must modify array.forEach(function (a) { to use an `Arrow function`.

array.forEach((a) => {

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