Iterators&Enhanced for loop

Using the raw iterator

Essential Java

While using the foreach loop (or “extended for loop”) is simple, it’s sometimes beneficial to use the iterator directly. For example, if you want to output a bunch of comma-separated values, but don’t...

Iterators Explained: The Magic Behind Your For Loops

Python in Plain English

Ever wondered what really happens when you write a for loop? Or why some objects work with loops while others don't? Let me share a story. I was pair programming with a colleague when they asked, “Why...

Iterators & Generators

Python Practice Book

5. Iterators & Generators  5.1. Iterators  We use for statement for looping over a list. for i in [ 1 , 2 , 3 , 4 ]: ... print ( i ) ... 1 2 3 4 If we use it with a string, it loops over its charac...

Creating your own Iterable structure for use with Iterator or for-each loop.

Essential Java

To ensure that our collection can be iterated using iterator or for-each loop, we have to take care of following steps: The stuff we want to iterate upon has to be Iterable and expose iterator() . Des...

Using Iterable in for loop

Essential Java

Classes implementing Iterable< interface can be used in for loops. This is actually only syntactic sugar for getting an iterator from the object and using it to get all elements sequentially; it makes...

For Each

Essential Java

With Java 5 and up, one can use for-each loops, also known as enhanced for-loops: List strings = new ArrayList(); strings.add("This"); strings.add("is"); strings.add("a for-each loop"); for (String st...

Iterator and Iterable

Essential Java

Versions [{“Name”:“Java SE 1.2”,“GroupName”:null},{“Name”:“Java SE 1.3”,“GroupName”:null},{“Name”:“Java SE 1.4”,“GroupName”:null},{“Name”:“Java SE 5”,“GroupName”:null},{“Name”:“Java SE 6”,“GroupName”:...

Advanced Iterators

Dive into Python 3

Just as regular expressions put strings on steroids, the itertools module puts iterators on steroids. But first, I want to show you a classic puzzle. Puzzles like this are called cryptarithms or alpha...

Exploring Asynchronous Iterators and Iterables: a Basic Example, aiter and anext

Real Python

Download your free Python Cheat Sheet here: https://realpython.com/cheatsheet Free Python Skill Test with instant level + learning plan: https://realpython.com/skill-test Want to learn faster? Become ...

Python for Loops Are Just the Surface. Let’s Talk Iterators.

Python in Plain English

I wrote my first for loop over 30 years ago — maybe in BASIC, C, or Pascal. I was in grade 7 or 8, and just getting access to a computer felt like a privilege. Looping through numbers with a few lines...

A gentle introduction to iterators in C++ and Python

Towards Data Science

Iterators are an incredibly useful programming paradigm for programmers of all levels and disciplines, including data scientists seeking to implement efficient data processing pipelines. Even if you…

Advanced Python Looping Concepts with the Itertools Module

Python in Plain English

The itertools module in Python is a powerful tool that provides a collection of efficient and memory-friendly iterator building blocks. These tools can be used to construct specialized iterators that ...