Ruby Iterate Array Reverse Order

Ruby class array def reverse iterate current index self size 1 while current index 0 yield self current index current index 1 end end end we now have an exit condition for the loop in our iterator which means we won t yield to the block more times than there are values in the array.

Ruby iterate array reverse order.

Open file and read content in ruby. Ruby arrays are not as rigid as arrays in other languages. End although indexes will go from 0 to length 1 not the other way around. Basic data structures in ruby scalar array hash reading csv file in ruby.

For loop in ruby iterating over array elements range in ruby. The programmer or the programming team and the project. Download an html page using ruby. The most basic form of sorting is provided by the ruby sort method which is defined by the enumerable module.

Learn to use the sort sort. These are just a few of the many ways. A negative index is assumed relative to the end of the array that is an index of 1 indicates the last element of the array 2 is the next to last element in the array and so on. The better ruby programmer continues to look for more ways.

However ruby makes it a cinch. So my answer is the right way to iterate through an array in ruby depends on you i e. You can use the array reversemethod to reverse the order of the elements in the array before iterating over them. The better ruby programmer makes the better choice of which syntactic power and or which object oriented approach.

Ruby arrays can hold objects such as string integer fixnum hash symbol even other array objects. You ll learn the different ways of sorting an array starting with the sort method then taking a look at sort by for advanced sorting by multiple values more. Reverse each is a array class method which traverses self in reverse order. Array reverse each with index do element index.

In other languages iterating in the opposite direction can be kind of a pain in the well you know. Traverses self in reverse order.