Ruby Loops And Iterators

Let s look at these in detail.

Ruby loops and iterators.

It uses method syntax. Iterators return all the elements of a collection one after the other. We will be discussing two iterators here each and collect. A loop is the repetitive execution of a piece of code for a given amount of repetitions or until a certain condition is met.

Times step loops test and benchmark iterators. If we discount the loop method then the for loop acts as a kind of bridge between looping constructs and iterators in ruby. You can use the for loop to loop over values in a range e g. Syntax collection each do variable code end.

The each iterator returns all the elements of an array or a hash. Loops and iterators loops are structures in ruby which allow you to easily repeat a section of code a number of times. Arguments to the iterator is re evaluated. Some operations in computer programming are best served with a loop.

Use times upto downto step and each in programs. An iterator is a looping construct in ruby. This chapter details all the loop statements supported by ruby. In ruby arrays and hashes can be termed collections.

The simplest way to create a loop in ruby is using the loop method loop takes a block which is denoted by. We optionally use an iteration variable enclosed in vertical bars. Ruby loops loops in ruby are used to execute the same block of code a specified number of times. This functionality can always be accomplished through simply writing repetitive lines of code however compacting everything into one loop makes changing a small feature about each repeated line very easy and it abides to the core don t repeat yourself principle of.