Ruby Iterate Array Reverse Order

Argv the command line arguments of a ruby program.

Ruby iterate array reverse order.

Iterate over characters of a string in ruby. Ruby arrays are not as rigid as arrays in other languages. So my answer is the right way to iterate through an array in ruby depends on you i e. These are just a few of the many ways.

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. End although indexes will go from 0 to length 1 not the other way around. The better ruby programmer makes the better choice of which syntactic power and or which object oriented approach. For loop in ruby iterating over array elements range in ruby.

Ruby arrays can hold objects such as string integer fixnum hash symbol even other array objects. In other languages iterating in the opposite direction can be kind of a pain in the well you know. However ruby makes it a cinch. First reverse the array and then use each with index.

The most basic form of sorting is provided by the ruby sort method which is defined by the enumerable module. Basic data structures in ruby scalar array hash reading csv file in ruby. 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. Reverse each is a array class method which traverses self in reverse order.

Download an html page using ruby. Open file and read content in ruby. The programmer or the programming team and the project. Array reverse each with index do element index.

The better ruby programmer continues to look for more ways. Learn to use the sort sort.