Re: Reading and wiping notes also adding more notes

[Ali Çehreli via Digitalmars-d-learn]

On 10/17/22 22:40, Joel wrote:

> I have two text fields. The one on the left has the whole text, new
> stuff being added to the bottom. The one on the right has text I've been
> wiping as I'm reading.
I think this can be modelled as a string array and an index showing 
where the active part starts:

import std;

struct Notes {
    string[] whole;
    size_t activeIndex;

    void add(string line) {
        whole ~= line;
    }

    string[] activeText() {
        return whole[activeIndex..$];
    }

    void wipeText() {
        ++activeIndex;
    }
}

void main() {
    auto input = [ "I went for a walk and fell down a hole.",
                   "There was a D guy on the roof.",
                   "That was a tricky problem!", ];

    Notes notes;

    // add() to add()
    input.each!(line => notes.add(line));

    // activeText() will show the active part
    // wipeText() will move forward
}

Ali