Method filter

Extension/src/Utility/Process/streams.ts:74–93

(expression: string | RegExp)

    }

    async filter(expression: string | RegExp) {
        const result = new Array<string>();
        const stream = this.tee();
        if (expression instanceof RegExp) {
            for await (const line of stream) {
                const check = expression.exec(line);
                if (check) {
                    result.push(check[1] || check[0]);
                }
            }
            return result;
        }
        for await (const line of stream) {
            if (line.includes(expression)) {
                result.push(line);
            }
        }

        return result;
    }

    /**
     * Splits the iterator into two, and advances the new iterator to the line that matches the expression.