@lodestar/flare/lib/util/format.js

Beacon chain debugging tool

/**
 * Parse string inclusive range: `0..32`, into an array of all values in that range
 */
export function parseRange(range) {
    if (!range.includes("..")) {
        throw Error(`Invalid range '${range}', must include '..'`);
    }
    const [from, to] = range.split("..").map((n) => parseInt(n));
    if (Number.isNaN(from))
        throw Error(`Invalid range from isNaN '${range}'`);
    if (Number.isNaN(to))
        throw Error(`Invalid range to isNaN '${range}'`);
    if (from > to)
        throw Error(`Invalid range from > to '${range}'`);
    const arr = [];
    for (let i = from; i <= to; i++) {
        arr.push(i);
    }
    return arr;
}
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