An iterator is an object-oriented programming pattern which for the most part functions similarly to a pointer to an object inside a collection with the added ability to traverse through the collection in a defined manner, agnostic of the actual implementation or even object addresses in physical ...

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9
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2answers
194 views

Using a Pythonesque range() generator function with the Java foreach loop

Now that we have the nice new foreach loop in Java, the old-style loop looks ugly be comparison. I like the way Python has a range() generator that allows the ...
-1
votes
1answer
57 views

Error caused by c++ iterator in 2D Point structure [closed]

I've written a structure of 2D Point. But it doesn't compile due to some errors caused by iterator. I can't figure it out. Here is my code: ...
2
votes
1answer
44 views

Iterator for binary tree - pre, in, and post order iterators

Implemented iterator for a binary tree and "pre" "in" and "post" order flavors. I'm looking for code review, best practices, optimizations etc. ...
7
votes
2answers
221 views

Iterator class using a square list

I am trying to implement squarelist by using iteration that points to the head element. I've create this iterator class to make my iterator id directional. I just want to see if I implemented it ...
2
votes
2answers
312 views

Creating linked list data with iterator pattern

I've created a linked list to use it in SquareList. I've started to create a linked list based on just that. I want my class to follow the iterator pattern. How can it be improve to use vector ...
3
votes
1answer
59 views

Serializing tabular data in ruby — is map, flatten, hash the correct approach?

I wanted a hash which lets me reference Japanese syllables by their romanized names. In hindsight I could have searched for an existing one column table, but I wanted to improve my ruby by writing a ...
0
votes
0answers
72 views

REST Response: Checking for Success and Error

I thought this was pretty slick - maybe not, I just wanted to share and maybe get some feedback: As part of a REST client class: Accepts the JSON response from REST or REST-like service, searches ...
5
votes
1answer
84 views

Iterator adaptor for iterators returning tuple-like values

Today, I will require to help to improve an iterator adapter. The goal of the adapter (I called it get_iterator) is to adapt ...
3
votes
1answer
217 views

Iterator Implementation

I had to write my own iterator implementation for my structure which has ArrayList<Vector> field. An iterator is supposed to iterate over mentioned ...
0
votes
1answer
88 views

Filtering a long list of files through a set of ignore patterns using iterators

I have a backup job that walks across a huge directory with potentially millions of files. Python's os.walk() works just fine. Now, I have implemented a feature to ignore files based in a black list ...
4
votes
3answers
775 views

Flatten iterator for nested list

Given a list which can can contain elements as well as lists, write an iterator to flatten a nested list. Please make this code better and suggest any improvements. ...
3
votes
2answers
78 views

Remove item from a list, which (of the 2) methods is better?

I have a List, and I have to delete one item from the list when I find it. I am using the code below to do that: ...
8
votes
2answers
375 views

“Zip-like” functionality with C++11's range-based for-loop

My goal was to get the following code to work: ...
3
votes
1answer
81 views

Design considerations for copy_if_max() algorithm?

I need a copy_if_max() function, i.e. copy all the elements in an input range that are equal to the max in that range. The most obvious implementation does two ...
2
votes
3answers
148 views

Is this a correct recursive Scala iterator creation?

I am diving into Scala (using 2.10) headfirst and am trying out a simple task of taking bulk data and then doing something with that stream. The first part is generating that stream. I have seem to be ...
1
vote
1answer
240 views

Creating custom random access iterator in C++ 2011

I would like an opinion on my code. I need a random access iterator for my custom container. If I read the C++ 2011 standard, specially chapter 24, I understood that an implementation could be the ...
2
votes
1answer
91 views

How to remove goto statement from iterator

I'm implementing a simple iterator in C# over an xml document, in order to process an xml document in as much a streaming manner as possible. For this reason, I'm using an XmlReader variable in a ...
4
votes
1answer
349 views

Python reversed in C++11

I was playing with C++11 wonderful new features and tried to reimplement a function reversed that would behave just like the one in Python to allow reverse ...
3
votes
3answers
980 views

Most efficient way to iterate through arrays/can I use .times method in place of while method?

I created a quick program to test the precision of randomness generated by the .rand method. The primary question is whether I can use the ...
5
votes
1answer
568 views

How to make an iteration in a for-loop faster?

I have a list with contentlets and want all languages from every contentlet (I get these with the method ...
3
votes
0answers
294 views

Iterator and Generator version of python range function

I have created iterator and generator version of python range function Here is Generator version: ...
2
votes
1answer
357 views

Polymorphic STL foreach without passing the container type

I was trying to figure out how to make a foreach macro for STL containers that is break-able and I came up with this method that uses templates to recognize the container type automatically. Any ...
2
votes
3answers
808 views

Converting base-10 numbers into base-26 letters

I'm writing something that basically takes a bunch of files and renames them into a nice format, such as pic_000.jpeg, ...
22
votes
4answers
430 views

infix_iterator code

I've previously posted this on Stack Overflow, and am considering submitting it to Boost for wider distribution, but thought perhaps it would be best to put it up for peer review first, and see if ...
3
votes
2answers
436 views

Is this good Ruby? And is there a Ruby equivalent for Java hasNext() in iterators?

I'm switching to Ruby from Java and so, for exercise purposes, I wrote this verbose leap year Ruby program. The comments express my concerns about Ruby best practices. I'd be glad if some Ruby ...
2
votes
4answers
218 views

Designing an iterator like interface in C

I have a blob whose format is something like below (id1,key1,value1)(id2,key2,value2).... where id is a uint32_t, key and value are null terminated strings. I am looking for an iterator like ...
1
vote
1answer
651 views

Tortoise and hare cycle detection algorithm using iterators in Python

Reading the article in Wikipedia about cycle detection I came across a relatively small code snipped of Floyd's cycle-finding algorithm. I'll put it here to keep everything in one place: ...
6
votes
2answers
442 views

How can I avoid unchecked cast warning in my generic recursive Iterator?

It's somewhat odd that Java's collection framework has no iterator for recursive data structures. Since I needed something like this, I wrote my own. First off, I need recursive elements: ...
3
votes
4answers
2k views

Iterator pattern/iterator class

I have implemented a simple iterator. Just want to check if I have missed anything. ...
1
vote
1answer
123 views

Can you make this Key-interable view of a List of Maps better?

I have a list of map entries, and I need an iterable that returns the keys. Of course, we could be naive and copy over into a new collection of the desired type, but that's inefficient. So let's ...
9
votes
2answers
401 views

Sudoku Grid special purpose Iterators

Please have a look at these iterators which I use for my Sudoku solver. They behave slightly different from STL iterators and don't implement all functionality that would be needed to use them in a ...