keshavab

package main

import (
        "fmt"
        "time"
)

func main() {
        var ch chan int

keshavab

(dlv) vars
panic: runtime error: makeslice: len out of range

goroutine 75 [running]:
panic(0x4620220, 0xc820ea3f30)
	/usr/local/Cellar/go/1.6/libexec/src/runtime/panic.go:464 +0x3e6
github.com/derekparker/delve/proc.(*Thread).readMemory(0xc820d76190, 0xc820090000, 0xfffffffffffffff0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/private/tmp/delve20160603-64173-7ebqc8/delve-0.11.0-alpha/src/github.com/derekparker/delve/proc/threads_darwin.go:112 +0x9c
github.com/derekparker/delve/proc.cacheMemory(0x61a0ad8, 0xc820ef92f0, 0xc820090000, 0xfffffffffffffff0, 0x0, 0x0)
	/private/tmp/delve20160603-64173-7ebqc8/delve-0.11.0-alpha/src/github.com/derekparker/delve/proc/mem.go:42 +0xf2

keshavab

index - 3, value - 4
index - 3, value - 4
index - 3, value - 4
index - 3, value - 4

keshavab

package main

import "fmt"

func functions() []func() {
	// pitfall of using loop variables
	arr := []int{1, 2, 3, 4}
	result := make([]func(), 0)

	// functions are not evaluated, functions definitions are returned

keshavab

counter -  100
counter1 -  100
counter -  101
counter1-  100
counter -  101
counter1-  102

keshavab

package main

import "fmt"

func counter(start int) (func() int, func()) {
	// if the value gets mutated, the same is reflected in closure
	ctr := func() int {
		return start
	}

keshavab

package main

import "fmt"

func outer(name string) func() {
	// variable
	text := "Modified " + name

	// closure. function has access to text even after exiting this block
	foo := func() {

keshavab

package main

import "fmt"

func outer(name string) {
	// variable in outer function
	text := "Modified " + name

	// foo is a inner function and has access to text variable, is a closure
	// closures have access to variables even after exiting this block

keshavab

package main

import "fmt"

func printMessage(message string) {
	fmt.Println(message)
}

func getPrintMessage() func(string) {
	// returns an anonymous function

keshavab

box: debian
build:
  steps:
    - script:
        name: install git
        code: |
            apt-get update
            apt-get install git -y
    - script:
        name: fetch theme sub module