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3,129 Points@transactions.each do |transaction| balance += transaction[:amount] end
Why do I need to use the [] behind transaction? can't I use {}?
3 Answers
Michael Hulet
47,913 PointsYou use square brackets ([]
) to get values out of both arrays and hashes. This is called "subscripting". There's no difference in the way you access values between arrays and hashes. In fact, you can generally think of an array as a hash with only sequential FixNum
keys
Cindy Lea
Courses Plus Student 6,497 Points[] are usually used for array elements & the {} is used to group code so theyre 2 different things.
vo thi quynh yen
3,129 Pointsbut i thought because transactions is a hash, and a hash syntax is {}, so why do I have to use [] instead of {} when refering to an element in a hash?