Nodejs Array Equal equals(array)

Method Source Code

// Some basic functions for degree/radian conversion
function toRadians(degrees) { return degrees * (Math.PI / 180);}
function toDegrees(radians) { return radians * (180 / Math.PI);}

// Comparing arrays; unfortunately, JS does not have an ==; here we modify
// the Array prototype directly
Array.prototype.equals = function (array) {
    if (!array) { return false; }
    else if (this.length != array.length) { return false; }
    // else/*  w w w .j av  a2  s . c  o m*/
    for (var i = 0, l = this.length; i < l; i++) {
        // Check for nested arrays
        if (this[i] instanceof Array && array[i] instanceof Array) {
            // recurse
            if (!this[i].equals(array[i])) { return false; }
        }
        else if (this[i] != array[i]) { return false; }
    }

    // If we get to the end, we've checked all the elements
    return true;
};

function unitVector(vector) {
    return vector.map(function(v) { return parseFloat(v)/norm(vector); });
}

function norm(vector) {
    return Math.sqrt(vector.map(
        function(v) { return v*v; }).reduce(
            function(a, b) { return a + b; }));
}

function angleOf(vector) { return Math.atan(vector[1]/vector[0]); }

Related

1. equals(array)

   Array.prototype.equals = function(array) {
     var answer = this.every(function(element, index) {
       return element === array[index];
     });
     if (answer) {
       return answer;
     } else {
       return 'Not equal!\n' + 'Expected: [' + array + ']\n' + 'Got: [' + this + ']';
   function assertEqual(value, expected) {
     if (Array.isArray(value) && Array.isArray(value)) {
       if (value.equals(expected)) {
         console.log("Passed");
       } else {
         console.log("Failed");
         console.log("Got: ", value);
         console.log("Expected: ", expected);
     } else {
       if (value === expected) {
         console.log("Passed");
       } else {
         console.log("Failed");
         console.log("Got: ", value);
         console.log("Expected: ", expected);
   module.exports = { assertEqual };
   

2. equals(array)

   Array.prototype.equals = function (array) {
     if (!array)
       return false;
     if (this.length != array.length)
       return false;
     for(var i = 0, l = this.length; i < l; i++) {
       if (this[i] instanceof Array && array[i] instanceof Array){
         if (!this[i].equals(array[i]))
         return false;
   ...
   

3. equals(array)

   Array.prototype.equals = function (array)
       if (!array)
           return false;
       if (this.length != array.length)
           return false;
   ...
   

4. equals(array)

   Array.prototype.equals = function(array){
       if(!array){
           return false;
       if(this.length != array.length){
           return false;
       for (let i = 0; i < this.length; i++){
           if(this[i] != array[i]){
   ...
   

5. equals(array)

   if(Array.prototype.equals)
       console.warn("Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.");
   Array.prototype.equals = function (array) {
       if (!array)
           return false;
       if (this.length != array.length)
           return false;
       for (var i = 0, l=this.length; i < l; i++) {
           if (this[i] instanceof Array && array[i] instanceof Array) {
   ...
   

6. equals(array)

   Array.prototype.equals = function(array) { 
       if (!array)
           return false;
       if (this.length !== array.length)
           return false;
       for (var i = 0, l = this.length; i < l; i++) {
           if (this[i] instanceof Array && array[i] instanceof Array) {
               if (!this[i].equals(array[i]))
                   return false;
   ...
   

7. equals(array)

   Array.prototype.equals = function (array) {
     if (!array)
       return false;
     if (this.length != array.length)
       return false;
     for (var i = 0, l = this.length; i < l; i++) {
       if (this[i] instanceof Array && array[i] instanceof Array) {
         if (!this[i].equals(array[i]))
           return false;
   ...
   

8. equals(array, strict)

   Array.prototype.equals = function (array, strict) {
       if (!array)
           return false;
       if (arguments.length == 1)
           strict = true;
       if (this.length != array.length)
           return false;
       for (var i = 0; i < this.length; i++) {
           if (this[i] instanceof Array && array[i] instanceof Array) {
   ...
   

9. equals(array, strict)

   function gridToCanvas(gridX, gridY) {
     var canvasX = gridX * 16;
     var canvasY = gridY * 16; 
     return [canvasX, canvasY];
   function isInt(num) {
     return !(num % 1 != 0);
   Array.prototype.equals = function (array, strict) {
   ...