Questions tagged as 'javascript'

Tagged questions
4
answers

How to change background with javascript?

I have a function in javascript that returns the day and time for text, for insertion into html, how can I add styles to this text, should I do within javascript or even in html function date_time(id){ date = new Date; year = dat...
asked by 14.02.2014 / 15:44
2
answers

Dynamic Grouping of JSON Data

I have been trying for some days to dynamically group JSON data, but without success, it is a matter of logic rather than programming itself. Given an array of objects (Users), group them according to their attributes (name, age, etc.). Th...
asked by 19.10.2017 / 19:46
3
answers

Use .on () instead of .bind () in CakePHP's JsHelper

When I write Ajax with CakePHP's JsHelper, if I write something like this $this->Js->get('#searchCity')->event( 'click', $this->Js->request( 'http://api.geonames.org/searchJSON', array( 'async...
asked by 14.02.2014 / 13:31
3
answers

How do Javascript functions behave in relation to scope?

In Javascript, functions are objects and can be passed as a parameter to other functions. But when a function with dependencies on an object, such as variables and other functions, is passed to another object? Does it always run from the first o...
asked by 17.01.2016 / 02:25
6
answers

How to make an "alert" in PHP?

I'm doing an e-mail form in PHP, and I'm trying to make a alert when the client clicks submit a validation. The validation seems to work because it redirects to the page I want, but does not show alert . Is this code correct?...
asked by 14.03.2015 / 18:07
4
answers

What's wrong with my map version for an array in JS?

var kiko = [1,2,3,4,5,6]; var forEach = function(array, newArray, action){ for (var i=0; i<array.length; i++){ var newArray = []; newArray.action(array[i]); }; }; forEach(kiko, newKiko, push) newKiko I'm studyi...
asked by 10.06.2015 / 19:20
3
answers

Behavior difference between for and for..in

I have the following code that works exactly as expected (that is to go through the array, showing ONLY each element, in this case "Miguel" and "Celeste"): var runners = ['Miguel', 'Celeste']; Array.prototype.winner = function() { for...
asked by 15.12.2016 / 11:55
3
answers

Why does JavaScript allow you to use variables without declaring?

I was testing the JSFiddle with the code below. In it I did not declare the variable i , but even so, I can use it normally. Is this intentional or is it a failure? So, can I just quit using non-declared, Python-style variables? I...
asked by 13.12.2016 / 16:36
4
answers

Separate an array into groups?

I have the following code answered by a question similar to this but I would like to upgrade, this is the current function: function separar(base, maximo) { var resultado = [[]]; var grupo = 0; for (var indice = 0; indice < base.leng...
asked by 19.05.2017 / 14:58
2
answers

How does the sort method work?

I'm starting to learn javascript and while looking for examples of sort I came across the following code: var numeros = [1,2,3,4,5,6,7,8,9,10]; numeros.sort(function (a, b) { return (a % 2 !=0); }); console.log (numeros); The console ou...
asked by 22.10.2017 / 16:56