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Found 7 results

  1. I was fiddling with „Accessing Arrays with Named Indexes“ section examples of the Javascript tutorial and run into a situation I cannot explain. In short, I create an array 'person', then add elements to the array by index, and then add a third element by name. According to the tutorial, this should convert the array to an object (see here: https://www.w3schools.com/js/js_mistakes.asp) . Instead, after this I can access the variable 'person' as both an array (with two elements) and an object (or rather, a person.age property of the object). typeof 'person' reports: object. var person
  2. BACKGROUND: I recently discovered the following piece of code on StackOverflow,. Although it works for a single property comparison, I do not understand it well enough to expand it to cope with multiple properties. function getUnique(inputArr, comp) { const unique = inputArr.map(e => e[comp]).map((e, i, final) => final.indexOf(e) === i && i).filter(e => inputArr[e]).map(e => inputArr[e]); return unique; } I would like to create a function that would permit the comparison of multiple values on the order of function getUnique(inputArr, comp1 [, comp2[, comp3
  3. I have four items in an object and want to store the result in an array. I want to add objects to the array and access the individual items in an object within the array. Isobject_in_array_project.htmlobject_in_array_project.htmlobject_in_array_project.html this possible. some literature says yes and other says no. Basicly a database in memory is what I am trying to do.
  4. I recently used PHP's json_encode( ) function to covert an array created with PHP into a JSON encoded object, as the conversion appeared normal, I then assigned the value to a Javascript variable using PHP's echo construct and reproduced it with a JS alert. This too, appeared normal. My difficulty arose when I tried using the jQuery .map( ) method to convert my nested Javascript object into a nested Javascript array. I received the following error message in my Console: TypeError: e is not an Object. (evaluating 't-1 in e') Am I being foolish to believe that I need a nested array whe
  5. Hello I've been messing around with a small script i've put together from reading various different turorials about drag and drop. I just cannot get removeEventListener to work.. Basically you can begin dragging but the element is stuck on the mouse and you cannot drop it. I've been able to set a variable to toggle on and off to stop it from dragging but I want to understand how to use removeEventListener incase I need it in the future. I appreciate any help. I've posted all of the code at the following JS Fiddle, however for some reason the dragging won't work at all on JS Fiddle: (sor
  6. Hello, I'm trying to make a method that creates objects of a parameterized type randomly, but also to store the hashCode of different objects created and if at any time the percentage of different objects is less than 50% throw an exception. This last part is where I've gotten stuck. I have created a population property where I store the different hashCodes and update it in the method adding the new hashCode from the new object. But I don't know how to do for to know if the percentage of different objects is less than 50%. See if someone can help me out. Regards!
  7. I've kind taught myself PHP whilst looking online for examples. I use classes, I just wonder if I'm setting up my classes the right way. Do you have to explicity give a class access to another class in the way I've done below?: $db = new dbConnectionMSSQL();$systemLog = new systemLog();$clubTickets = new clubTickets();$Customers = new Customers();$Events = new Events();$TicketOrders = new TicketOrders();$PlacesOfInterest = new PlacesOfInterest();$Tonight = new Tonight(); $clubTickets->db = $db;$clubTickets->Customers = $Customers;$clubTickets->Events = $Events;$clubTickets->Places
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