Go is a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.
5
votes
2answers
67 views
2
votes
3answers
49 views
Pythagorean Triple Generator
I'm just playing about with Go, and am trying to solve some project euler problems to get used to it.
I've created a generator function for Pythagorean triples, using a channel which returns a set of ...
3
votes
0answers
23 views
Reading from and writing to a file without passing around filename
I was looking for a way to write to and then read from a file in different parts of my code, without passing the filename around and without consumers needing to know it was coming from a file.
I ...
2
votes
0answers
23 views
Most efficient way to remove specific items from a slice
Given a slice of unknown length (potentially very small or very large), and another slice containing (unique) integers indicating indices to be removed from that slice, the most straight forward way ...
1
vote
0answers
34 views
Binary heap implementation in Golang
I have implemented a binary heap in Go to get familiar with the language.
GitHub
...
3
votes
1answer
96 views
Golang async but sequential enqueue with buffered channel
The objective of this program is to call enqueue sequentially with multiple URLs, and never block, fetching the URLs asynchronously, but on the order they were entered.
In other words: keep calling ...
4
votes
1answer
80 views
Remove element slice of struct pointers
I have an application with a recent addition that requires the removal of a struct pointer from a slice that is itself an element of another struct. A summary of the usage.
I am wondering if this is ...
2
votes
0answers
31 views
Implementation of the closest pair algorithm
I just started learning Go. To start playing with it, I've implemented the fast power algorithm:
Here is the pseudo-code I used (source):
...
4
votes
2answers
66 views
Return results from goroutines
I have two goroutines that each need to return their results to the main function. These results are of different types.
I have implemented a solution that uses a structure that holds these results. ...
1
vote
0answers
26 views
ttyname() implemented in Go
I'm rewriting GNU's coreutils in Go in order to learn Go better. I've implemented ttyname(3), and I'm looking for a general critique. I can't think of anything in particular I think I did poorly on. ...
3
votes
1answer
37 views
Walking and comparing contents of binary trees
I've written a solution for http://tour.golang.org/concurrency/8, which asks for a Walk() function to traverse a randomly generated binary tree, and a ...
2
votes
0answers
157 views
Golang concurrent HTTP request
I wanted to test the performance of concurrent http request in Go against node.js:
...
3
votes
1answer
48 views
Fast power in Go
I just started learning Go. To start playing with it, I've implemented the fast power algorithm:
Any suggestions or criticisms regarding the coding style?
...
2
votes
0answers
28 views
Basic Binary Tree in Go
As an exercise I have written a basic binary tree implementation in Go.
Tree struct:
...
3
votes
0answers
60 views
Is this minimal Go cookie authentication system safe?
I'm working on a login system in Go (Golang). Previously, I was using Gorilla Sessions for this, but I wanted to see if I could reinvent the wheel and make it simpler.
Also, I don't need to store ...
1
vote
0answers
20 views
Filesystem-dependant unit-testing in go
I recently rewrote a piece of software to practice unit-testing. I decided to constrain myself and do dependency-free code, so I can do better and easier tests. I came to the following solution while ...
3
votes
1answer
57 views
Convert int64 to custom base64 number string
I want to convert int64 to custom base 64 number string, with this specification:
...
5
votes
1answer
67 views
Number database using binary trees
I recently got interested in Go and wrote a database server which uses a binary tree for data storage for fun. As I have no prior experience in Go, I'd like to gather a bit feedback on my code and ...
2
votes
0answers
29 views
Parsing CSVs for bulk database insertions
I'm writing this as (eventually) part of a larger program. This will serve as the bulk data insertion from .csv files we parse.
I'm primarily looking for parts that are
breaking Go's formatting, ...
12
votes
1answer
165 views
Go Go Gadget Web Crawler
In A Tour of Go, you are given the following problem:
In this exercise you'll use Go's concurrency features to parallelize a
web crawler.
Modify the ...
2
votes
0answers
47 views
Is this web service synchronized correctly?
I'm new to both concurrency programming and Go.
I've written a small server side script that gets the title and ratings of a book for a given ISBN. I've to optimise performance by using a cache and ...
4
votes
1answer
256 views
Unmarshaling dynamic JSON
I have JSON object response returned from the server which is similar to this one:
...
3
votes
1answer
49 views
Command line flags & sorting algorithms
I've made my first-ever program in Go, which sorts a given input of integers. There are 2 options: The list of unsorted integers and the algorithm to use.
Since it's my first go project I'm a bit ...
4
votes
1answer
183 views
Merge sort in Golang
I am just starting out with golang. I implemented the merge sort algorithm just to practice.
Any suggestions or criticisms regarding the coding style?
...
7
votes
2answers
173 views
Subnetting calculator in Go
Whenever I try to learn a new language, I write a subnetting calculator. Here's my attempt with Go.
In particular, I think I'm not writing idiomatic Go, as well as abusing ...
1
vote
0answers
33 views
Daisychain channels
I watch the presentation about concurrent programming presented by Rob Pike and I saw the daisychain example. I tried to rewrite this code to make it more readable. Everything went well, but I am ...
7
votes
1answer
405 views
Golang HTTP status checker
I'm writing my first somewhat production ready (or not) Go program and could do with some feedback from someone more experienced with go.
The code reads a list of URLs from a JSON file and then makes ...
4
votes
1answer
436 views
Graph (adjacency list) for BFS and DFS in Golang
I am trying to implement a Graph data structure in Golang and choose to use adjacency list representation. When starting to implement adjacency list, I have an idea ...
4
votes
1answer
91 views
Channels vs. “for loop” prime number generator
I've found a question on SO (here), which is a prime number generator that uses channels. First of all, I had some trouble to find out how this code works, but later on, I saw the fun of it. Then, all ...
4
votes
0answers
47 views
Reading OS X file tags
I'm investigating Go for use in our internal network / office project management system, and need a way to check and edit the color tags that you can set in Finder on files or folders (extended ...
4
votes
0answers
83 views
Equivalent binary trees (structure & values)
I am following the Golang tour and I have been asked to build a couple of functions to manipulate binary trees.
My code runs as expected, but I would like to know if I could further improve my code. ...
3
votes
2answers
63 views
Go string formatting
I'm very new to Go, and am trying to get some experience by re-writing some of my Python code in Go. Below is a function that takes an IP address (ipv4) in integer form and returns the string ...
5
votes
1answer
95 views
Is my spin-lock implementation correct?
I'm working on a project where a spinlock is more appropriate than a mutex, and after few tries I came up with:
...
3
votes
2answers
159 views
in_array() in Go
This function's objective is very simple. It takes array and checks if val is a value inside of this array. It returns whether ...
2
votes
1answer
76 views
Deferred log file close
My code works in that it compiles, and when executed writes out a log file using a buffered writer.
But I wonder whether:
I am correct in assuming that this actually winds up deferring a ...
1
vote
1answer
65 views
Securely shuffling an array with 75 numbers in Go
I have a SHA512 hex string consisting of my random input and that of the user.
Since rand.Seed only accepts a int64 I can never ...
7
votes
2answers
105 views
Is this a good way of managing parallel go routines when I care about ordering of results?
I have a process with a number of stages that need to be completed in sequence. Each stage is largely parallelisable, involving looping over a large data structure and processing each item ...
3
votes
1answer
38 views
File-based Equation Evaluation in Go
My program 'Monkey', written in Go, can take a file like this:
+ 9 13
/ 10 2
And prints the output (in the case for the 'file' above, '22' and '5'.)
Variables ...
3
votes
2answers
180 views
Implementation of merge sort and bubble sort
I'm new to Go and looking for a review of my merge sort and bubble sort implementations. What can be done better? Can my code be cleaner/clearer?
...
2
votes
2answers
81 views
Two-dimensional array allocation in Go
I am creating a two-dimensional array, which I am going to process later in ways similar to image MinFilter, procedural labyrinth generation, etc. -- implying using coordinates and neighbors.
Here ...
3
votes
0answers
95 views
Concurrent download in Go
I wrote a program for downloading files in concurrent / parallel (GOMAXPROCS > 1) manner.
This is my 2nd (non-toy) program written in Go. Please point out areas for improvement:
...
3
votes
0answers
53 views
Most intuitive way to register “commands” in an extensible IRC bot in Go
I'm writing an IRC bot as a toy project, and one of the goals is to be easy and straight-forward to implement and register new commands.
As I'm new to Go, I don't know which would be the "Go way" for ...
4
votes
1answer
70 views
Number formatting
As part of a simple (naive) internationalization attempt in Go, I am trying to come up with a number formatting routine with customizable decimal and thousands separator.
Is this approach alright?
...
3
votes
0answers
56 views
Does this go raytracing program follow best practices, and typical project layout?
I'm working through learning Go, so as an exercise, I'm writing a simple raytracer. I'd like general feedback on the code style & architecture. Specific areas of concern:
Is the project layout ...
6
votes
1answer
122 views
Four algorithms to find the Nth Fibonacci number
I'm implementing some basic algorithms in Go as an introductory exercise. Here are four different algorithms to find the Nth Fibonacci number.
I'm looking for general feedback, but I'm specially ...
3
votes
0answers
183 views
Parsing an infix notation expression and converting to reverse polish notation
I'm pretty new to Go, and I do not know the best or idiomatic ways to do most of the stuff, so I'd appreciate feedback on how to make my code better, faster or more idiomatic.
My program is a set of ...
4
votes
3answers
111 views
Wrote a package in Go. What did I do wrong? What did I do right?
I wrote a Player package in Go. It builds correctly, but I would love a review on what I did and did not do "the Go way". I'm new to coding in the language, although I've gotten about halfway through ...
2
votes
1answer
67 views
Make logparser faster
I'm learning go. I wrote a simple logparser for SLF4J in Python some time ago and tried to port it to go as an exercise. The algorithm is identical, but the go-solution isn't quite as fast (the Python ...
0
votes
0answers
129 views
Iterative DFS algorithm
I've written an iterative version for DFS. For a quick overview of the benchmark results for a complete graph:
So it looks like it behaves within the boundaries of the theoretical complexity.
...
3
votes
0answers
80 views
Queue with “unlimited” buffer in Go
This is small piece of bigger puzzle, but usable by its own.
It an attempt to have a nonblocking queue with "unlimited" (besides memory size) buffer length.
Got unit-tests 100% statement coverage, it ...
