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Found 19 results

  1. Hello - first time posting. I've searched the forums to see if anyone else had the same question, with no luck. I'm going through the lessons in the tutorial but I can't figure out what's going on in part of the JS Type Conversion lesson. I'll link to the full lesson here, but below is the part I'm having trouble with: (mainly the function) I have no idea what's happening in the function... could someone be kind enough to break it down in detail for me? I understand how arrays work. But the function here has me stumped. Thanks so much
  2. Hello, I'm having issues trying to set up custom input number arrows, I'm currently learning JavaScript so I'm not really sure what I'm missing, here is my code. HTML <div class="orden"> <label for="pase por dia">Boletos deseados: </label> <div class="caja_ticket"> <input type="number" min="0" id="test" size="3" placeholder="0" class="ticket"> <div class="botones_ticket">
  3. The JavaScript Array Methods (Merging an Array with Values) example doesn't use array in it's example, it still uses an array like in the examples above it. The square brackets in the argument to concat should be removed, leaving 3 separate string arguments. I think example could be improved to something like: var arr1 = ["Cecilie", "Lone"]; var nephew = "Nick"; var myChildren = arr1.concat("Emil", "Tobias", "Linus", nephew);
  4. This is in connection with the web page https://www.w3schools.com/js/js_arrays.asp. Array.isArray function does not return correct true when its argument is an array of object. What can be the reason? Is it a bug? A method suggested by W3ishools to use a tailor-made function function isArray(x) { return x.constructor.toString().indexOf("Array") > -1; } which also does not work, as in the code given below: <!DOCTYPE html> <html> <body> <h2>JavaScript Arrays</h2> <p>This "home made" isArray() function returns true when used on an ar
  5. List: collection which is ordered and changeable. But, if I create a list 'car' which is Unordered like that... car=["BMW","MAHINDRA","HERO","KTM"] print(car) SO, it does not support 'list' properties. But print result is ['BMW', 'MAHINDRA', 'HERO', 'KTM'] . Please help me that how it works even the 'list' is unordered, why it don't show any error message.
  6. Hi everyone, I am trying to set up the flexible with array, like set up the array by count the columns in tables in the Database, so I am still figure how to create variable word through loop to allow equalized from $_post as if $_post appear in two or three or four...I figured out to set up the $_post in loop, but I haven't find a way to have create new variable to equalized with $_post in loop in same time. here my code <!doctype html> <html> <head> <title>Add name and number</title> <link href="defaultdatabase.css" rel="stylesheet" typ
  7. smus

    Array cloning

    Sorry for stupid question. I can't understand the purpose of cloning an array in JS. Why do we need it? What is the difference between: let a = []; let b = a; and: let a = []; let b = a.slice(0);
  8. I can not fix this script, because the output is not in sync. I have 3 arrays. 1) present column names. 2) prefix (fixed name). 3) suffix (uniqid value). Can someone explain how exactly I should create a foreach loop in a foreach loop with 3 arrays and fetching the field value from the get_result command as the the value it is related to. This would result in: <---->Present Column Name <-----> New Column Name <---->value1 <--------------------------------> value1_abcd <---->value2 <------------------------------> value2_abc
  9. Hello, I have this array print: Array ( [0] => Array ( [name] => color [value] => red ) [1] => Array ( [name] => color [value] => blue ) [2] => Array ( [name] => color [value] => green ) [3] => Array ( [name] => age [value] => 16 ) ) I want to receive this result: Array ( [color] => Array ( [name] => color [value] => red, blue, green ) [age] => Array ( [name] => age [value] => 16 ) ) it works using the following php code: foreach ($feature_names as $row) { if (!isset($re
  10. Ok bare with me because I have no idea what this is actually called. If someone knows I will update the title. I am working on a site that will act as an out-of-game marketplace for in-game items. I want to ensure that the player is within the zone of the market in-game so I need an easy way to generate an array of valid coordinates the player could be within to access the market. Ideally i would like to run a function with a parameter specifying the radius of a square and another of the player's current geoID. Basic geometry would help if the geoID's were, in my mind, easier to predict.
  11. So I am working on a simple client database type program. I have a clients array that stores new clients that all have a first name, last name, phone number, etc... I also want the user to be able to add notes about their clients' family. So, one of the parameters of the client function is an array called familyNotes. Here is the code for this: function client(firstName, lastName, phoneNumber, address, hireDate, frequency, cost, entry, familyNotes) { this.firstName = firstName; this.lastName = lastName; this.phoneNumber = phoneNumber; this.address = address; this.hireDa
  12. I was try make loop in loop with array. it should be like: L1: T1&C1---L1: T2&C2---L1: T3&C3--- L2: T1&C1---L2: T2&C2---L2: T3&C3--- L3: T1&C1---L3: T2&C2---L3: T3&C3--- But I got other than that i thought, so what did i wrong?
  13. Hello, I've just read the tutorial on how to process a form in PHP, available on this site, and I was wondering if there's a specific reason to declare empty variables (or arrays) at the beginning? I don't understand what is the point of doing so. For example, in the following code, why would the 2sd and 3rd lines be necessary? <?php $errors = []; $name = $email = $message = ''; if (condition) { $errors['name'] = 'alert'; } else { $name = sanitize_input($_POST['name']); if (new_condition, $name) { $errors['name'] = 'new alert'; } }
  14. Hi there, Been trying to learn PHP in my spare time the last few weeks. Setting myself little tasks, challenges, mini projects etc. but I'm quite stuck on this one. I'm trying to create an associative array to hold the following information on monthly rainfall in millimetres (jpeg of table attached below). I then want to find the minimum, maximum and average rainfall per month and per year. I've created two arrays experimenting but only the second one is associative (I've attached the php file below as well), but here is the code anyways... <?php $multidimensional_array = array
  15. How to get an array index by its value (key)? Is there a special function for that in PHP? For example, I have an array $a ["zero","one","two"] and a variable $b = "two", I know the value is in the array, but I don't know its index.
  16. So this generates 3 arrays with 5 numbers in each one. How would I go about checking each array to see if there are any duplicate numbers in an array?
  17. I found an online function called GetDays and I slightly modified it to calculate the number of days between a past date and the current time. The function works fine for 1 input, but I have a table full of records and want to use the function to get the total days for each record separatedly. <?php // function GetDays($sStartDate, $sEndDate){ // Firstly, format the provided dates. // This function works best with YYYY-MM-DD // but other date formats will work thanks // to strtotime(). $sStartDate = gmdate("Y-m-d", strtotime($sStartDate)
  18. Hi everybody http://www.w3schools.com/js/js_array_sort.asp If I'm right, the JS-Tutorial about sorting arrays randomly has a lack. The order of the array is kind of in a random order at the first glance, but the elements often stay at the same place as they were. This is true in the most for the element at the end of the array and the effect happens in most browsers, but not in all of them. I've written a script to test this. In these browsers the elements are not evenly distributed as they should: Chrome, IE, Edge, Opera. In Safari they were evenly distributed when I tried it. Try it your
  19. I am working on a project for my job. I have php that creates multiple radio button lists through an array. There are 6 categories that that a list of radio buttons for each of the categories. I am trying to add an onclick javascript function to just one of the radio buttons. There is a text box on the very bottom, I want that to only show up if a certain radio button is clicked. I have the code attached below <?php $form_fields = array( "id" => array( "bsc_id", "fname", "mname", "lname", "email", "grad_id", "major_id", "grad_date", "deg_id", "age_id", "ethn_id", "res_id",
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