Simplify array immutable changes with the new array.with method

The new Array.with method gives you an immutable syntax for changing values of an array at a specified index.

Sometimes .map will be more efficient. So, in this lesson we'll compare both methods while replacing an object at a specific index.

~ 6 months ago

At the end of the video, instead of todos.at(0) it should be todos.at(idx) :)

~ 5 months ago

these videos are very quiet - I have to turn my computer volume up pretty high to hear anything...