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A more versatile alternative to VLOOKUP. An Index Match packs the power of a Vlookup and Hlookup in one formula. You also do not need to know which number column/row the information is. Due to this, deleting columns/rows will not mess up the formula.

ExtJS advocates the use of firing of and listening for events between classes. By firing events and listening for fired events, classes require no 'dirty' knowledge of each others' class structure and prevent coupling code together. Additionally, events make it easy to listen to multiple instances o...

Reader provides functionality to pass a value along to each function. A helpful guide with some diagrams can be found here: http://adit.io/posts/2013-06-10-three-useful-monads.html

Docker is a very popular container solution being used widely for deploying code in production environments. It makes it easier to Manage and Scale web-applications and microservices. This document assumes that docker is installed and the daemon running. You can refer to Docker installation to...

The typedef and (since C++11) using keywords can be used to give a new name to an existing type. typedef type-specifier-seq init-declarator-list; attribute-specifier-seq typedef decl-specifier-seq init-declarator-list; // since C++11 using identifier attribute-specifier-seq(opt) = type-id; /...

The aim of this post is to get started with profiling nodejs application and how to make sense of this results to capture a bug or a memory leak. A nodejs running application is nothing but a v8 engine processes which is in many terms similar to a website running on a browser and we can basically c...

Often times we have to create some components which perform some actions/operations on data and we require that in the parent component. Most of the times vuex would be a better solution, but in cases where the child component's behavior has nothing to do with application state, for instance: A rang...

Dplyr and many modern libraries in R use non-standard evaluation (NSE) for interactive programming and standard evaluation (SE) for programming1. For instance, the summarise() function use non-standard evaluation but relies on the summarise_() which uses standard evaluation. The lazyeval library m...

We can utilize CI's shopping cart library when we are building a e-commerce site. we can setup add to cart, update cart items, delete cart items and even clear the cart functionalities using this library. From CodeIgniter Doc : The Cart Class permits items to be added to a session that stays active...

The QListView widget is part of the Model/View programming mechanisms of Qt. Basically, it allows to display items stored in a Model under the form of a list. In this topic we will not get deep into the Model/View mechanisms of Qt, but rather focus on the graphical aspect of one View widget: the QLi...

When laying out controls, it is easy to hard-code specific values in margins and paddings to make things fit the desired layout. However, by hard-coding these values, maintenance becomes much more expensive. If the layout changes, in what might be considered a trivial way, then a lot of work has to ...

This topic discusses how to map one-to-one type relationships using Entity Framework.

The topic discusses how you can map one-to-many and many-to-many relationships using Entity Framework Code First.

Savepoints are "fat", externally stored checkpoints that allow us to resume a stateful flink program after a permanent failure, a cancelation or a code update. Before Flink 1.2 and the introduction of externalized checkpoints, savepoints needed to be triggered explicitly.

What should go here, as opposed to webdev.dartlang.org/angular? Eventually this page will have guidelines on what goes where. (Is there a better place for this?) Please comment on https://github.com/dart-lang/site-webdev/issues/471. Background: There are plenty of docs at (aka angulardart.org),...