35 lines
795 B
TypeScript
35 lines
795 B
TypeScript
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export class IterLines {
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public position: number = 0;
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constructor(public text: string) {}
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next() {
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if (this.position >= this.text.length) {
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return undefined; // no more lines
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}
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const start = this.position;
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while (
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this.position < this.text.length &&
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this.text[this.position] !== "\n"
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) {
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this.position++;
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}
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const line = this.text.slice(start, this.position);
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this.position++; // skip the newline character
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return line;
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}
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[Symbol.iterator](): Iterator<string> {
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let line: string | undefined = this.next()!;
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return {
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next: () => {
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const nextLine = this.next();
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const r = { value: line as string, done: nextLine === undefined };
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line = nextLine;
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return r;
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},
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};
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}
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}
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