Lazy evaluation refers to a variety of concepts that seek to avoid evaluation of an expression unless its value is needed, and to share the results of evaluation of an expression among all uses of its, so that no expression need be evaluated more than once.
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Lazy WebAPI object
I am working to design an object which would abstract away the use of a WebAPI. I want the developer to be able to use these objects as if they are using a traditional API.
My core problem is how to ...
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93 views
Caching data by using the result of first running operation
My code handles concurrent requests by waiting for the result of an already running operation. Requests for data may come in simultaneously with same/different credentials (including empty ...
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71 views
Poor man's lazy evaluation in Java 8
I have an class that cheaply imitates a lazy evaluation scheme. The class is for representing a file and additionally providing meta data on the file. Some of the meta-data can be expensive to ...
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3answers
121 views
Unity Lazy Resolve Implementation
I have been using Microsoft.Unity as my container and have decided that the approach for a lazy implementation causes too much rework. Each time you decide to swap ...
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Reading lines from a file in random order
I originally wrote this as an answer to a question on Stack Overflow, but it turned out so nicely that I decided to post it here to see if I can make it even better.
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1answer
51 views
Clojure word count
I'm fairly new to Clojure and looking to improve my use of the proper idioms, and make my code more readable. Here's the problem:
Read from standard input and produce the count of each word to ...
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1answer
65 views
Early-termination foldLeft for Scala Streams
The foldRight and foldLeft methods for Scala Streams cannot terminate early, so here is my ...
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102 views
Date formatters, lazily instantiated once
I would like to create two date formatters only on first call. In Objective-C I would use dispatch_once() but now working in Swift. Am I doing it correctly? My code ...
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3answers
250 views
Loading visible images
I am using this code to get images to load only if they are visible. However, it seems to be slow with thousands of images, even if they are not rendered.
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2answers
487 views
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Lazy properties for the angle and length of a line segment
The code below shows the pattern I use to manage properties in my classes when I have the following requirements:
Some properties are slow to calculate and are rarely used, so I want them to be lazy
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284 views
Lazy String.Split
C#'s String.Split method comes from C# 2.0, and lazy operations weren't a feature back then. The task is to split a string according to a (single) separator. Doing ...
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1answer
71 views
SICP streams in C++
To brush up on my C++ chops, I've implemented a toy version of "SICP Streams", which behave like lists with one twist: the first element of the list is always available, the rest of the list is stored ...
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1answer
116 views
Converting an array-returning function to a lazy evaluator
Take a look at the following function:
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1answer
205 views
Lazy Load for multiple entities at a time
We have a system with a non standard database solution. All trips to the DB are rather expensive. We cannot use entity framework.
Currently our lazy loading is on an entity by entity basis. So if I ...
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57 views
Perfect elimination ordering and high memory usage
The following code calculates a perfect
elimination ordering in a special case in Haskell.
I am less worried about its correctness than
its high use of memory. The following code runs
out of memory ...
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3answers
675 views
Lazily Load CSS and JS
I have written this piece of JS and CSS loading code and I would like some advice on it. Anything some of the JavaScript gurus could possibly point out would be much appreciated. The code works, but I ...
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1answer
370 views
AsyncLazy disposal
I've made this extension method. Its purpose is to trigger the disposal of a value, stored in a Nito.AsyncEx AsyncLazy, as authored by @StephenCleary.
Is this an ...
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2answers
497 views
Generic cached value class mimicking Lazy<T>
Before I wrote this I searched and found a number of solutions that make use of a caching provider to handle a set of items. I felt that was too cumbersome of an approach and set out to create a class ...
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2answers
120 views
Azure cache getoradd (without locking)
Inspired by the non-locking implementation proposed in this post, the following code is an attempt to (about) do the same using the azure cache. As I'm totally green on the Azure cache I'd appreciate ...
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2answers
202 views
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1answer
800 views
Lazy loading with __get
I have my own PHP MVC framework that I'm iteratively developing (i.e. adding a feature when I have the time). I'm trying to keep it to the best practices I can, while still adding the most in terms of ...
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222 views
Are there any issues in this `Lazy` implementation?
I have written following small utility to abstract away the lazy initialization logic. (I tend to use lazy variables quite often.)
Are there any issues in this implementation?
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2answers
877 views
Lazy class instantiation in Python
I've written some class which allows me to derive from it to make objects lazy-instantiated. Do you see notational improvements or maybe even cases where this method might not work (multiple ...
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1answer
246 views
Lazy look and say sequence
I have been solving a set of online Clojure problems. One of them involves the look and say sequence.
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