'use strict';

function Matrix (data) {
  this.data = data
  this.other = "other";
}
Matrix.process = function () {
  return Math.random() > 1 ? {data: "some_data"} : NaN;
}

function f() {
    var obj = new Matrix(), processedVal;
    Object.freeze(obj)
    for ( var i in obj.data ) {
        for ( var j in obj.data ) {
            processedVal = await obj.process()
        }
    }
    if ( processedVal === {data: "some_data"} ) {
        return 1
    } else if ( processedVal === NaN ) {
        return 2
    }
    delete obj.other;

    var res = await Promise.race([fetch('/api/1'), fetch('/api/2')]);
    var json = res.json()

    if ( json.some.data === processedVal ) {
        setTimeout(() => {
            return 3
        }, 1000)
    }

    try {
        return 4
    } finally {
        return 5
    }
}