Iterators&Enhanced for loop - Learn Data Science with Travis

Iterators-and-Enhanced-for-loop

Iterators and enhanced for loops are fundamental concepts in programming, particularly in languages like Python and Java. An iterator is an object that enables traversing through a collection, such as lists or arrays, without exposing the underlying structure. It maintains the current position in the collection, allowing for sequential access to its elements. Enhanced for loops, also known as for-each loops, simplify the process of iterating over collections by abstracting the iterator’s complexity. They provide a cleaner and more readable syntax, making it easier for developers to work with collections without needing to manage the iteration process manually.

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...

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...

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...

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...

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”:...

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...

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...

— Functions creating iterators for efficient looping

The Python Standard Library

itertools — Functions creating iterators for efficient looping This module implements a number of iterator building blocks inspired by constructs from APL, Haskell, and SML. Each has been recast in a...

Bypassed facts about for-loop(s) and Iterator in Java.

Javarevisited

Obviously, no Java developer is there without knowing for loops, but how detailed do we know them? In which situations does each suit best? How they internally work, why would certain things happen wh...

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...

Understanding Java Iterators: A Deep Dive

Javarevisited

What is an Iterator? An Iterator is an object that provides methods to traverse a collection, element by element. It is part of the java.util package and defines three core methods: hasNext() : Return...

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...