Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | 1x 13x 13x 2x 23x 3x 7x 2x 2x 3x 5x 6x 24x 8x | // Copyright (C) 2017 Norman Breau
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
export class Iterator<T> {
private collection: Array<T>;
private cursor: number;
constructor(collection: Array<T> = [], index: number = -1) {
this.collection = collection;
this.cursor = index;
}
public hasNext(): boolean {
// return this.cursor + 1 < this.collection.length;
return !!this.collection[this.peekNextIndex()];
}
public next(): T {
// return this.collection[++this.cursor];
return this.collection[this.incrementIndex()];
}
public hasPrevious(): boolean {
// return this.cursor > 0;
return !!this.collection[this.peekPreviousIndex()];
}
public previous(): T {
// return this.collection[this.cursor--];
return this.collection[this.decrementIndex()];
}
public reset(): void {
this.bringToStart();
}
public bringToStart(): void {
this.cursor = -1;
}
public bringToEnd(): void {
this.cursor = this.collection.length - 1;
}
public peekNextIndex(): number {
return this.cursor + 1;
}
public peekPreviousIndex(): number {
return this.cursor;
}
public incrementIndex(): number {
return ++this.cursor;
}
public decrementIndex(): number {
return this.cursor--;
}
}
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