79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
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// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import (
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"fmt"
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s "github.com/inancgumus/prettyslice"
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)
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/*
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If you find this code hard to understand, please comment
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some parts of it and run it again.
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*/
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func main() {
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// example #1
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slice := []int{5, 6, 7, 8, 9}
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s.Show("slice", slice)
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// fmt.Println("slice[0]:", slice[0])
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// fmt.Println("slice[1]:", slice[1])
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// fmt.Println("slice[2]:", slice[2])
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// fmt.Println("slice[3]:", slice[3])
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// fmt.Println("slice[4]:", slice[4])
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// example #2
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sliced := slice[1:4]
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s.Show("slice[1:4]", sliced)
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// fmt.Println("sliced[0]:", sliced[0])
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// fmt.Println("sliced[1]:", sliced[1])
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// fmt.Println("sliced[2]:", sliced[2])
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// fmt.Println("sliced[3]:", sliced[3]) // -> you can't
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// example #3
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// the new slice will also be effected from this change
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sliced = append(sliced, 15)
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slice[1] = 200
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s.Show("append(sliced, 15)", sliced)
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// example #3b
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// the new slice won't be effected anymore
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// because, go has created a new array for the `s`
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sliced = append(sliced, 3)
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slice[1] = 0
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s.Show("slice[1] = 0", slice)
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s.Show("sliced", sliced)
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// example #4
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// its pointer will stay the same until 8 elements
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sliced = append(sliced, 10, 11, 12)
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s.Show("append(sliced, 10, 11, 12)", sliced)
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// now it will change: 13 the wicked number!
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sliced = append(sliced, 13)
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s.Show("append(sliced, 13)", sliced)
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// example #5
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var (
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// just declaring it will make it nil
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nilButHappy []int
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// without any elements will make empty
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empty = []int{}
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)
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s.Show("Empty Slice", empty)
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s.Show("Nil Slice", nilButHappy)
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fmt.Println("empty == nil?", empty == nil)
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fmt.Println("nilButHappy == nil?", nilButHappy == nil)
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}
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