javascript for loop reassignment
I have a for loop like below let oArr = [1,1,1,1,1,1,1,1,1] let n = 9 let k = 5 let mArr = [] for (let j = 0; j < k; j++) { for (let i = 0; i <…
How to check all values in object property same in array using javascript
How to check if array of object property has same value using javascript If cid is same value in array of object, then return true. note: cid is not always ad 109 might change var arrobj = [{"cid":109,"aid":220},{"cid":109,"aid":221}] // I…
Javascript – Removing a specific index from an array
this function takes an array and a number, and returns a new array which has the item at array[number] removed. my code works, but is there a simpler/better practice way of doing this? function removeItem(array, n) { let newArr =…
Javascript – how to correctly get data from object
i have array with objects like this: { tab: "Quality Assurance", value: "qa", titles: [ "Web App Interfaces3", "Backend Application Development", "Single-page Apps", "Technical Backend Audit", ], content: [ "3We build web apps and websites with clean architecture and user-friendly…
Javascript – Why there's always an empty element at the first index?
Whenever i tried to put something in my todoList there's alwasy an empty element at first indext Why it is happening? const [todoList, setTodoList] = useState([]); const addToList = (inputText) => { if (inputText === "") { alert("List is Empty")…
Javascript – Checking duplicate objects in array with some and 2 conditions
I have data from a form that needs to be compared to its older data. I want to check if an object was in the previous old data and if its slot number changed. Data example const oldData = [{name:…
Javascript – Changing one element in 2D Array results into changing all of them
I am trying to understand the 2D Arrays in Google Apps script and I have been stuck with this unexpected behavior, I want to change just one element within an I and J position but it results to changing many…
Javascript – Why useEffect's dependency array's variable's size has to be constant between renders?
I was changing a state between renders and logging that value on every time the state changes via useEffect. I noticed my console is showing this error bellow: image of console showing the error. I'm not understanding why is it…
How does JavaScript know the difference between the spread and rest operator?
The syntax is identical so how does JavaScript distinguish the two under the hood? Does it look at the data type of the variable that is being operated on? Or where that variable is being used? Both or neither?
Php – Count the column of array
In this array output, how can I count the type column? Or better, how can I exclude the addition_data when counting it? Answer should be 3 since there are only 3 type column Array ( [124] => Array ( [type]…