109 lines
3.0 KiB
Go
109 lines
3.0 KiB
Go
// 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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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"strings"
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s "github.com/inancgumus/prettyslice"
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)
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func main() {
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lyric := strings.Fields(`yesterday all my troubles seemed so far away now it looks as though they are here to stay oh I believe in yesterday`)
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// `+3` because we're going to add 3 newline characters to the fix slice.
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fix := make([]string, len(lyric)+3)
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//
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// USE A SLICE TO STORE WHERE EACH SENTENCE ENDS
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//
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// + The first sentence has 8 words so its cutting index is 8.
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//
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// yesterday all my troubles seemed so far away now it looks as though they are here to stay
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// |
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// v
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// cutting index: 8
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//
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//
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// + The second sentence has 10 words so its cutting index is 10.
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//
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// now it looks as though they are here to stay oh I believe in yesterday
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// |
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// v
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// cutting index: 10
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//
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//
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// + The last sentence has 5 words so its cutting index is 5.
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//
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// oh I believe in yesterday
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// |
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// v
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// cutting index: 5
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//
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cutpoints := []int{8, 10, 5}
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//
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// `n` tracks how much we've moved inside the `lyric` slice.
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//
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// `i` tracks the sentence that we're on.
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//
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for i, n := 0, 0; n < len(lyric); i++ {
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//
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// copy to `fix` from the `lyric`
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//
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// destination:
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// fix[n+i] because we don't want to delete the previous copy.
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// it moves sentence by sentence, using the cutpoints.
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//
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// source:
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// lyric[n:n+cutpoints[i]] because we want copy the next sentence
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// beginning from the number of the last copied elements to the
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// n+next cutpoint (the next sentence).
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//
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n += copy(fix[n+i:], lyric[n:n+cutpoints[i]])
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//
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// add a newline after each sentence.
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//
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// notice that the '\n' position slides as we move over.
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// that's why it's: `n+i`.
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//
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fix[n+i] = "\n"
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// uncomment to see how the fix slice changes.
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// s.Show("fix slice", fix)
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}
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s.Show("fix slice", fix)
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// print the sentences
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for _, w := range fix {
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fmt.Print(w)
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if w != "\n" {
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fmt.Print(" ")
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}
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}
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}
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func init() {
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//
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// YOU DON'T NEED TO TOUCH THIS
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//
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// This initializes some options for the prettyslice package.
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// You can change the options if you want.
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//
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// This code runs before the main function above.
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//
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// s.Colors(false) // if your editor is light background color then enable this
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s.PrintBacking = true // prints the backing arrays
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s.MaxPerLine = 5 // prints max 15 elements per line
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s.SpaceCharacter = '⏎' // print this instead of printing a newline (for debugging)
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}
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