I know that when I am working in JavaScript, I prefer to keep everything to using promises or async/await instead of occasionally using callbacks because a library doesn’t support them.
Adding Promise Support to a Node.js Library
Tag: javascript
How to read an Excel file in NodeJs
My favourite library for reading, writing, and manipulating Excel files in Node.JS is ExcelJS. In this tutorial, we’ll look at how to install the library and how to dynamically read an Excel file.
Outputting a CSV File from Node.js
After reading this article, you will understand how to export data from a database or other system using a csv library in Node.js.
CSV stands for common separated values file which means that data can be stored in a tabular format with commas separating each value.
JavaScript Tricks to Save Time & Frustration
In my everyday life as technology leader (“tech lead”) and full stack developer I run into a lot of problems that need to be solved every day.
What is Test Driven Development?
TDD is a lot more than vanity metrics like the percentage of code covered by tests. Test Driven Development (TDD) is a development process that consists of the tests being designed and written before most of the code is written.
Functional Programming with JavaScript
JavaScript is really suitable for function programming because of functions being first class. Functions being first class means that JavaScript treats them as a type of object.
Running Serverless Framework Functions Locally
Developing locally makes a lot more sense than deploying to a dev environment consistently because it helps save time, save some cloud costs, and avoids obvious embarrassment. 🙂
Is jQuery Dead?
I don’t think jQuery is dead at this point, but it’s growth seems to be slowing.
How to Delete node_modules on Windows
Deleting node_modules on Windows 7 and Windows 10 can be a frustrating experience if you try to do it from Windows Explorer or Command-Line because the file path names tend to get really long.
NodeJs: ReferenceError: fetch is not defined
As you may have noticed, fetch doesn’t work in Node.js.
The fetch API isn’t implemented in Node, so you need to use a package that implements it and then use that.
10 JavaScript Array Methods Every Programmer Should Know
Arrays are usually used to store a list of elements that need to be accessed by a single variable.
I believe that to use JavaScript effectively every developer should be able to use any one of these methods on an array. These methods can save a lot of lines of codes and also allow us to do some pretty awesome function programming!
Automatically Compressing Images With NodeJs
Over the years, I’ve worked on a number of projects where we deal with user or company provided images which are often very large resolutions which take a long time to download on mobile phones or or poor internet connections.
This is a simple script that can be used to compress images and avoid potential costs of a service like Kraken.io
How to Remove Duplicates From An Array in JavaScript
As a JavaScript developer, there’s occasionally a need to remove duplicates from an array of values.
By using our knowledge of advanced data sets we can write a lot less code and take advantage of built in features in JavaScript.
Introduction to the Knex.js Database Module
Knex is a JavaScript / Node.js library that is designed to make working with relational databases easier. Knex.js is a SQL query builder.
It has the potential to make tdd and database versioning much easier.
Book Review: JavaScript: The Good Parts
Although, JavaScript: The Good Parts is nearly ten years old I would argue it’s still a pretty good book to read. Literally, as the title implies the book calls out the best parts of the javascript language and tells what parts of the language to avoid. Continue reading
What is ORM?
Most software projects need to talk to a database at some point – they usually do GET queries for data, update a field or create a record. In the past, people would write raw code that communicated with the database and built an object or some code representation of the data that they would manipulate. This lead to an incredible amount of duplicated code for every project that usually had some subtle bug that was present in all libraries. Continue reading
What does “use strict” do in JavaScript?
Strict mode became available in ECMAScript 5 to allow us to prevent certain actions from being taken and to allow it to throw better exceptions.
Strict mode allows us to write better quality JavaScript.
Implementing a Palindrome Checker in JavaScript
A palindrome is a word or sentence that’s spelled the same way both forward and backwards. Most of the time when doing these challenges during programming interviews you’re told to ignore punctuation, case and spacing.
What is a Self Invoking Function
In JavaScript, it’s common to hear lots of strange terminology without a lot of description around what it is or what it does. I want to try and demystify what a self invoking function is and why you should consider them and the times when maybe you shouldn’t consider them. Continue reading
Why JavaScript
In the earlier days of the web, there was a battle between two scripting languages VBScript and JavaScript. VBScript, thankfully, eventually died and JavaScript became the dominant language for making really easy to use and interactive websites.
In the years since, JavaScript has become more and more used. Backend code can be written in basically any language, even in JavaScript, but the client side will almost always require a developer with some JavaScript knowledge. Every industry has a lot of javascript and some are even rewriting core functionality to use more. Surprisingly, even large banks and credit card companies are beginning to use JavaScript or Node in big ways. PayPal has been rewriting very large parts of their code base to make it more scalable and usable. Continue reading