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Anton Egorov satyrius

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satyrius / install.sh
Last active September 29, 2015 17:08 — forked from asenchi/notes.md
Homebrew formula for VIM with python interpreter support
brew install python --framework
mkdir ~/Library/Frameworks/
cd ~/Library/Frameworks/
ln -s /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework .
brew install -v https://gist.github.com/satyrius/1635076/raw/vim.rb
@satyrius
satyrius / install.sh
Created February 28, 2012 08:36
Dotfiles installation
cd $HOME
git clone git@github.com:satyrius/dotfiles.git .dotfiles
cd .dotfiles
for f in $(ls); do df="../.$f"; rm $df; ln -s "$(pwd)/$f" $df; done;
cd $HOME
rm .README.dm
@satyrius
satyrius / exercise-24.go
Last active December 26, 2015 07:09
A Tour of Go. Exercise: Loops and Functions. As a simple way to play with functions and loops, implement the square root function using Newton's method. In this case, Newton's method is to approximate Sqrt(x) by picking a starting point z and then repeating: To begin with, just repeat that calculation 10 times and see how close you get to the an…
package main
import (
"fmt"
"math"
)
func Sqrt(x float64) float64 {
z := 1.0
for i := 1; i <= 10; i++ {
@satyrius
satyrius / exercise-36.go
Created October 23, 2013 06:18
A Tour of Go. Exercise: Slices. Implement Pic. It should return a slice of length dy, each element of which is a slice of dx 8-bit unsigned integers. When you run the program, it will display your picture, interpreting the integers as grayscale (well, bluescale) values. The choice of image is up to you. Interesting functions include x^y, (x+y)/2…
package main
import "code.google.com/p/go-tour/pic"
func Pic(dx, dy int) [][]uint8 {
res := make([][]uint8, dy)
for y := range res {
res[y] = make([]uint8, dx)
for x := range res[y] {
res[y][x] = uint8((x + y) /2)
@satyrius
satyrius / exercise-41.go
Created October 23, 2013 06:23
A Tour of Go. Exercise: Maps. Implement WordCount. It should return a map of the counts of each “word” in the string s. The wc.Test function runs a test suite against the provided function and prints success or failure. You might find strings.Fields helpful.
package main
import (
"code.google.com/p/go-tour/wc"
"strings"
)
func WordCount(s string) map[string]int {
res := make(map[string]int)
for _, w := range strings.Fields(s) {
@satyrius
satyrius / exercise-44.go
Created October 23, 2013 06:25
A Tour of Go. Exercise: Fibonacci closure. Let's have some fun with functions. Implement a fibonacci function that returns a function (a closure) that returns successive fibonacci numbers.
package main
import "fmt"
// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
var a, b int
return func() int {
a, b = b, a + b
@satyrius
satyrius / exercise-48.go
Created October 23, 2013 06:29
A Tour of Go. Advanced Exercise: Complex cube roots. Let's explore Go's built-in support for complex numbers via the complex64 and complex128 types. For cube roots, Newton's method amounts to repeating: Find the cube root of 2, just to make sure the algorithm works. There is a Pow function in the math/cmplx package.
package main
import (
"fmt"
"math"
"math/cmplx"
)
func Cbrt(x complex128) complex128 {
z := complex128(1)
@satyrius
satyrius / exercise-56.go
Created October 23, 2013 06:33
A Tour of Go. Exercise: Errors. Copy your Sqrt function from the earlier exercises and modify it to return an error value. Sqrt should return a non-nil error value when given a negative number, as it doesn't support complex numbers. Create a new type type ErrNegativeSqrt float64 and make it an error by giving it a func (e ErrNegativeSqrt) Error(…
package main
import (
"fmt"
)
type ErrNegativeSqrt float64
func (e ErrNegativeSqrt) Error() string {
return fmt.Sprintf("cannot Sqrt negative number: %v", float64(e))
@satyrius
satyrius / exercise-60.go
Created October 24, 2013 20:11
A Tour of Go. Exercise: Images. Remember the picture generator you wrote earlier? Let's write another one, but this time it will return an implementation of image.Image instead of a slice of data. Define your own Image type, implement the necessary methods, and call pic.ShowImage. Bounds should return a image.Rectangle, like image.Rect(0, 0, w, …
package main
import (
"code.google.com/p/go-tour/pic"
"image"
"image/color"
)
type Image struct{
Width, Height int
@satyrius
satyrius / docker_clean.sh
Last active August 29, 2015 14:04
Drop stopped Docker containers and and untagged images
#!/bin/bash -e
docker ps -a -q | xargs docker rm
docker images | grep '^<none>' | awk '{print $3}' | xargs docker rmi