Apr 3

Golang: Creating Images and Drawing — Simply Explained (Part 2)

Drawing functions to unleash your creativity — In the first part of the titular article (i.e. Part 1), we were introduced to the various data structs and the image.Image interface in the standard golang library. In this part 2, let’s look at compositing. Compositing Compositing is where you have a few images and you want to layer them…

Golang

4 min read

Mar 24

Golang: Creating Images and Drawing — Simply Explained (Part 1)

Let your right brain work with your left to unleash your artistic talent Understanding the key elements of the framework Golang is useful and oft mentioned for it’s web development functions. So let’s take sometime to understand the components of the imaging framework to get the lay of the land. Interface image.Image The interface is what you need to…

Image

4 min read

Mar 7

Golang: gRPC Steps Explained

Step by step guide — High level overview of gRPC Define service using protocol buffer language Generate native code magic glue to tie readable protobuf definition and code (server & client application code you will write) Write Server side code Write Client side code First, what is gRPC? We know RPC stands for Remote Procedure Call. I have also done…

Golang

3 min read

Mar 1

E-Paper (Golang Port) — Epd for the Raspberry Pi

Introduction I have the e-paper hat for the Raspberry Pi, specifically the 2.7 inch display. As I was tickering with Golang as a system programming, I wondered whether I could control the hat using the Go language. After much research, I found the periph.io project, which supports communications via the SPI…

Raspberry Pi

2 min read

Feb 17

Salient Points for Protocol Buffers

Simply Explained (for Golang) — How to start .proto file? syntax = "proto3"; Without the line above, the complier for protocol buffer will assume the syntax is based on proto2. Specify Field Types All fields are scalar type: string, float, int32, int64, uint32, uint64, sint32, sint64, fixed32 (always 4 bytes), fixed64 , bool, string, bytes etc. message Foo { //this is a message…

Golang

3 min read

Published in System Weakness

·Feb 10

Golang: Understanding how Go HTML template system prevents Crossed Site Attack (XSS)

We often hear about XSS attacks and the importance of escaping user-submitted content. These attacks are deemed basic and developers may not fully appreciate how easy it is to trigger the attacks. …

4 min read

Golang: Understanding how Go HTML template system prevents Crossed Site Attack (XSS)

Published in Towards Dev

·Feb 3

Golang: Using buffered channel like a mutex

In the sync library that’s part of the official Go package, the following statement is made: Package sync provides basic synchronization primitives such as mutual exclusion locks. Other than the Once and WaitGroup types, most are intended for use by low-level library routines. …

4 min read

Golang: Using buffered channel like a mutex

Feb 2

Golang: Technique for Handling Panic — Simply explained

What distinguishes a good programmer from a bad one is often down to handling of errors. This is no different in Go. Building resilient systems that will recover should be the goal for Go developers. Panic vs Error in Golang Go has a unique exception systems. In fact, it doesn’t believe in exception. Instead, it…

4 min read

Golang: Technique for Handling Panic — Simply explained

Published in Dev Genius

·Jan 31

Golang: Using Regex Pattern Matching with net/http

The net/http package is known to be power and easy to use. It’s easy to spin up to serve http urls. However, the URL pattern recognition is basic and hence often, programmer will turn to third party packages e.g. Gorilla Mux for their routing needs. But what if you are…

Golang

3 min read

Jan 27

Abridged Dart Language Tour — For the Seasoned Programmer

I learnt Dart when fiddling with Flutter projects and never had a formal introduction to the language. What I know, I saw from codes. Dart feels like a combination of many modern languages — fat arrows, async / await, Futures, from Javascript, getters / setters from Python, and OO from C++. Today, as I was going through the Dart language tour so as to refreshed to work on a Flutter project, I thought to summarize the lengthy page into a series of important points — all 90 of it. Credit of course goes to the wonderful and fabulous Google Dart team. But I hope the “abridged” version will be a gentler and salient introduction of the language features to new and intermediate programmers and even advance users that just want to have a quick refresher. Here we go.

Dart

1 min read

Abridged Dart Language Tour — For the Seasoned Programmer

Today, as I was going through the Dart language tour so as to refreshed to work on a Flutter project, I thought to summarize the lengthy page into a series of important points — all 90 of it. Credit of course goes to the wonderful and fabulous Google Dart team. But I hope the “abridged” version will be a gentler and salient introduction of the language features to new and intermediate programmers and even advance users that just want to have a quick refresher. Here we go.

Golang: Creating Images and Drawing — Simply Explained (Part 2)

Golang: Creating Images and Drawing — Simply Explained (Part 1)

Golang: gRPC Steps Explained

E-Paper (Golang Port) — Epd for the Raspberry Pi

Salient Points for Protocol Buffers

Golang: Understanding how Go HTML template system prevents Crossed Site Attack (XSS)

Golang: Using buffered channel like a mutex

Golang: Technique for Handling Panic — Simply explained

Golang: Using Regex Pattern Matching with net/http

Abridged Dart Language Tour — For the Seasoned Programmer

Abridged Dart Language Tour — For the Seasoned Programmer

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