This is for Project Euler’s 8th question, which asks you to find the greatest product of five consecutive digits in this one really long number. My code is definitely NOT the most elegant solution, but I’m pretty sure it should work. And it does seem to work with small numbers, but once the number I test is greater than 16
Tag: arrays
JavaScript load Images in an Array and Show in Image Source
I created an array of images I then create a function that is linked with a in my html file: My image tag : <img id=”pic” src=”” height=”300″ width=”500″ border=”0″ alt=”image”> This fails to update my img object, i used firebug to look at the DOM and my array is being populated properly but the img src is not be
Are JavaScript Arrays actually implemented as arrays?
The difference between a JavaScript Array, and Object is not very big. In fact it seems Array mainly adds the length field, so you can use both Arrays and Objects as numeric arrays: So my questions is, in popular JavaScript engines (V8, JavaScriptCore, SpiderMonkey, etc.), how is this handled? Obviously we do not want our arrays to be actually stored
How to check whether multiple values exist within an Javascript array
So, I’m using Jquery and have two arrays both with multiple values and I want to check whether all the values in the first array exist in the second. For instance, example 1… Array A contains the following values 34, 78, 89 Array B contains the following values 78, 67, 34, 99, 56, 89 This would return true …example 2:
Javascript sort function. Sort by First then by Second
I have an array of objects to sort. Each object has two parameters: Strength and Name I want to sort first by Strength and then by name alphabetically. I am using the following code to sort by the first parameter. How do I sort then by the second? Thanks for your help. (I am using Array.sort() with the aforementioned sortF
Sort array of objects by single key with date value
I have an array of objects with several key value pairs, and I need to sort them based on ‘updated_at’: What’s the most efficient way to do so? Answer You can use Array.sort. Here’s an example:
How can I add new array elements at the beginning of an array in JavaScript?
I have a need to add or prepend elements at the beginning of an array. For example, if my array looks like below: And the response from my AJAX call is 34, I want the updated array to be like the following: Currently I am planning to do it like this: Is there a better way to do this? Does
Get column from a two dimensional array
How can I retrieve a column from a 2-dimensional array and not a single entry? I’m doing this because I want to search for a string in one of the columns only so if there is another way to accomplish this please tell me. I’m using the array defined this way: At the end the size of this array is
How to get subarray from array?
I have var ar = [1, 2, 3, 4, 5] and want some function getSubarray(array, fromIndex, toIndex), that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4]. Answer Take a look at Array.slice(begin, end)
Find object by id in an array of JavaScript objects
I’ve got an array: I’m unable to change the structure of the array. I’m being passed an id of 45, and I want to get ‘bar’ for that object in the array. How do I do this in JavaScript or using jQuery? Answer Use the find() method: From MDN: The find() method returns the first value in the array, if