FH problem set 3

gistfile1.txt

function countValueInArray(array, niddle) {
    return array.filter(item => item == niddle).length;
}

var fileText = [];

function readTextFile(file) {
    var rawFile = new XMLHttpRequest();
    rawFile.open("GET", file, false);
    rawFile.onreadystatechange = function() {
        if (rawFile.readyState === 4) {
            if (rawFile.status === 200 || rawFile.status == 0) {
                fileText = rawFile.responseText.split('\n'); // polygon per lin
            }
        }
    }
    rawFile.send(null);
}

/**
 * Is it a Triangle?
 */
function checkTriangle(set) {
    if (set.length != 3) {
        return false;
    }
    var a = parseInt(set[0]);
    var b = parseInt(set[1]);
    var c = parseInt(set[2]);

    if (((a + b) > c) && ((a + c) > b) && ((b + c) > a)) {
        return true;
    } else {
        return false;
    }
}

/**
 * Is it a square?
 */
function checkSquare(set) {
    if (set.length != 4) {
        return false;
    }

    var a = parseInt(set[0]);
    var b = parseInt(set[1]);
    var c = parseInt(set[2]);
    var d = parseInt(set[3]);

    var equal = set.reduce(function(sum, val) {
        return val === set[0];
    });

    return equal;
}

/**
 * Is it a rectangle or not?
 */
function checkRectangle(set) {
    if (set.length != 4) {
        return false;
    }

    var a = parseInt(set[0]);
    var b = parseInt(set[1]);
    var c = parseInt(set[2]);
    var d = parseInt(set[3]);

    if (((countValueInArray(set, a) == 2) && (countValueInArray(set, b) == 2)) || ((countValueInArray(set, c) == 2) && (countValueInArray(set, d) == 2)) || ((countValueInArray(set, a) == 2) && (countValueInArray(set, c) == 2)) || ((countValueInArray(set, a) == 2) && (countValueInArray(set, d) == 2)) || ((countValueInArray(set, b) == 2) && (countValueInArray(set, d) == 2)) || ((countValueInArray(set, b) == 2) && (countValueInArray(set, c) == 2))) {
        return true;
    } else {
        return false;
    }

}

// create polygons array

var polygons = [];
readTextFile('./polygons.txt');
fileText.forEach(function(p) {
    polygons.push(p);
});

var triangles = [];
var squares = [];
var rectangles = [];
var others = [];
var result;

// polygons loop of all sets

for (let i = 0; i < polygons.length; i++) {
    var set;
    set = polygons[i].split(',');

    if (set.length == 3) {
        result = checkTriangle(set);
        if (result == true) {
            triangles.push(set);
        } else {
            others.push(set);
        }

    } else if (set.length == 4) {
        result = checkSquare(set);
        if (result == true) {
            squares.push(set);
        } else if (checkRectangle(set) == true) {
            rectangles.push(set);
        } else {
            others.push(set);
        }

    } else {
        others.push(set);
    }
}

// as they are already mutually exclusive set/array

let unionOfAll = triangles.concat(squares.concat(triangles.concat(others)));

document.write("Original polygons txt file contents: <br>" + fileText.join("<br>") + "<br><hr><br>");

document.write("Mutually exclusive sets:-<br>");
document.write("Triangles: " + JSON.stringify(triangles) + "<br>");
document.write("Squares: " + JSON.stringify(squares) + "<br>");
document.write("Rectangles: " + JSON.stringify(rectangles) + "<br>");
document.write("Others: " + JSON.stringify(others) + "<br><hr><br>");

document.write("Union of all: " + JSON.stringify(unionOfAll) + "<br>");