Can you explain the difference between closure and scope?
Sure! Scope refers to the visibility of variables in different parts of your code, while closure is a function that retains access to its lexical scope even when the function is executed outside that scope.
Can you give me an example of a closure?
Absolutely! Here's a simple example:
function outerFunction() {
let outerVariable = 'I am outside!';
function innerFunction() {
console.log(outerVariable);
}
return innerFunction;
}
const myClosure = outerFunction();
myClosure(); // This will log 'I am outside!'
What about scope? Can you explain that with an example?
Of course! Scope can be global or local. For example:
let globalVar = 'I am global!';
function myFunction() {
let localVar = 'I am local!';
console.log(globalVar); // Accessible
console.log(localVar); // Accessible
}
myFunction();
console.log(localVar); // This will throw an error because localVar is not accessible here.
So, closures can access variables from their outer scope, but local variables can't be accessed globally?
Exactly! Closures allow inner functions to access variables from their outer function, while local variables are confined to their own scope.
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