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Julio Gonzalez
Courses Plus Student 2,576 PointsModifying values in array
In the video at 6:53 after todo[4] = "Brush teeth" the value of 4 is not only replaced but "Order book online" is pushed to what is now element 5 but when todo[0] = "Watch Treehouse content" the value of 0 is just replaced, "Finish collections course" doesn't get shifted
when I do this it only replaces the value of 4 but it doesn't extend "Order book online" on to a new element
Stephen Emery
14,384 PointsStephen Emery
14,384 PointsWhat is happening is that todo[4] and todo[5] are both equal to "Order book online." See below. So there is no pushing happening. You change todo[4] and todo[5] stays intact giving the impression todo[4] has moved.
Two of the same todos are created on the lines 14 -17 (from the lesson): // Concatenate array containing string literal to todo todo = todo + ["Order book online"] // Performing the same operation using the unary addition operator todo += ["Order book online"]
If you do a print(todo) on the line after "todo += ["Order book online"]", you will see this: ["Finish collections course", "Buy groceries", "Respond to emails", "Pick up dry cleaning", "Order book online", "Order book online"]
Hope that helps!