My array of todos is like this:
[{id:1,text:"hello"},{id:2,text:"hey"},{id:3,text:"ho"},{id:4,text:"let's go"}]
I am just so confused I need help with this code like this, it's for pagination in react:
selectTodosToDisplay = (todos, { index1: 2, index2:3 }) => {
return [...todos.slice(index1, index2),
...todos.slice(index2) ]
}
so with the above code I want to result into this
[{id:3,text:"ho"},{id:4,text:"let's go"}]
Maybe there's other methods for this? Help?
Array#slice returns a new array, so you don't need to spread it into a new one. The 2nd index should be 4, since Array#slice starts with the item in the 1st index, and ends with the item before the 2nd index. We can add 1 to the second index in the function.
const todos = [{id:1,text:"hello"},{id:2,text:"hey"},{id:3,text:"ho"},{id:4,text:"let's go"}];
const selectTodosToDisplay = (todos, { index1, index2 }) => todos.slice(index1, index2 + 1);
const result = selectTodosToDisplay(todos, { index1: 2, index2: 3 });
console.log(result);
var sample = [{ id: 1, text: "hello" }, { id: 2, text: "hey" }, { id: 3, text: "ho" }, { id: 4, text: "let's go" }];
var selectedID = 1;
function filterByID(item) {
if (item.id == selectedID) {
return true;
}
return false;
}
var arry = sample.filter(filterByID)
I hope it's work
Perfect use case for the JavaScript spread syntax:
const [first, second, ...rest] = [{id:1,text:"hello"},{id:2,text:"hey"},{id:3,text:"ho"},{id:4,text:"let's go"}];
console.log(rest);
selectTodosToDisplay = (todos, { index1: 2, index2:3 }) => todos.slice(index1, index2 + 1)
