NimaPrmi

Sorting arrays randomly

array.sort((a, b) => 0.5 - Math.random());

Sorting data from a to z

datas.sort((data, b) => data.name.localeCompare(b.name));

Sorting data from z to a

datas.sort((data, b) => data.name.localeCompare(b.name)).reverse()

We can delete data from an array using filter method then we can pass it to the react state like

const movies = this.state.movies.filter((m) => m._id !== movie._id);

Clone an object and modify the given indexed Value using JavaScript

handleIncrement = (counter) => {
    const counters = [...this.state.counters]; // Clone Object 
    const index = counters.indexOf(counter); // Find The Index
    counters[index] = { ...counter }; // Modify given (counter) with given index 
    counters[index].value++; // Increment Value or whatever
    this.setState({ counters }); // setState the new object (Cloned Object)
};

Get total selected (counted) items in React. uses for Count shop items. Will return total items in basket

this.state.counters.filter((c) => c.value > 0).length

Create array with given length. This will return an array with given length.

const createArrays = length => [...Array(length)]

Also we can manipulate data in it like

creatArrays(5).map((m , index) => "Given Value" + index)