Daryl Ng – Medium

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Why you need to avoid using append in Go

append is the go to function when you are adding an element to a slice. But is it the best way to do so? Short answer, no it isn’t. Here’s why… First, let’s create two functions that adds or assigns "x" to a string slice. WithAppend calls append to add…

Golang

2 min read

Aug 18, 2021

Build a serverless request poller on AWS

Here is a simplified architecture of the serverless request poller. The idea is to send the message to AWS SQS, which will then be picked up by AWS Lambda. In the message, you can define the maximum number of retries, retry count, message delay and the necessary parameters for the…

AWS

2 min read

Build a serverless request poller on AWS

Feb 19, 2021

Why you should avoid ioutil.ReadAll in Go

When you have an io.Reader , the most common way to read is with ioutil.ReadAll but it is not the best and most efficient way. So here are three functions to compare the different methods to unmarshal JSON from an io.Reader … With ioutil.ReadAll func IOUtilReadAll(reader io.Reader) (map[string]interface{}, error) {…

2 min read

Feb 17, 2021

Switch better than if-else in Go?

I am sure you have wondered if switch is more efficient than if-else, or vice versa. So here is a little experiment to compare them. If-else func If(i int) bool { if i == 1 { return true } else { return false } } 2. Switch with no condition …

Golang

1 min read

Published in NE Digital

·Feb 16, 2021

Unit testing in Go and its importance

I think we can all agree that we did not enjoy writing unit tests when we first started coding. We want to write for new features and maybe some occasional bug fixes. Then comes the day when we need to refactor or make some improvements… and BOOM! Unit testing in…

3 min read

Feb 6, 2021

How to concatenate strings efficiently in Go

Have you ever wonder if you are concatenating strings efficiently? I did, and so here are the results. But first, let’s discuss on three ways to concatenate strings. 1. Concatenation using + The easiest and cleanest way to concatenate strings is to use + . foobar := "foo" + "bar" 2. Concatenation using strings.Builder Another way is with…

Golang

2 min read

May 11, 2020

How to update WordPress with SELinux enabled

Are you getting permission errors when you update WordPress with SELinux enabled? And facing similar errors you when you install plugins like W3 Total Cache? You are not alone! I had experienced this problem some time ago and it took me several hours to realize that it is due to…

Apache

2 min read

Mar 1, 2020

Advantages and Disadvantages of FaaS

Speed to market is the key to success and is possible with serverless backend. With serverless technologies, you will not need to worry about managing your servers. You will be able to dive straight into implementation. Most cloud providers support Function as a Service, or FaaS, and it allows you…

Serverless

2 min read

May 17, 2019

How to build a serverless REST API using CloudFormation

What are AWS Lambda and API Gateway AWS Lambda lets you run your code without provisioning or managing any servers. This gives you a completely serverless architecture with little to no effort on maintenance. Amazon API Gateway is a fully managed service for managing your APIs. In order for your Lambda to run, it will need a…

AWS

2 min read