Advertisements const a=[1,2,3,4,5]; const [n]=a; console.log(n); I need to know how does something inside square brackets after const means, and why it stored only 1 and not the entire array. >Solution : It is ES6 Destructuring Assignment. const a = [1,2,3,4,5]; const [n] = a; const [m, o] = a; const [p, q, r] =… Read More Why is the output 1? Can someone explain me step by step about what is happening in the second line here?

Advertisements I was trying to build a simple Todo App with a currentTodo and an array of pastTodos. I was unable to push currentTodo to pastTodo using this code here. handleClick(e) { e.preventDefault(); let pastTodos = this.state.pastTodos; pastTodos.push(this.state.currentTodo); this.setState({ pastTodos: pastTodos, currentTodo: "" }); } and was only able to do by changing this line… Read More Why did I need to wrap the state in brackets to assign it to a variable in ReactJs?

Advertisements together with you, I have recently made the following function (the content is not important right now). It seems to be correct but when I try to process it, the following error turns up: Error: unexpected ‘}’ in " }". Do you know what I´ve made wrong? Here´s the function, thank you in advance… Read More Function for confidence intervals error code {