static repeat()

in x-template.js [115:131]

• 17 lines of code
• 7 McCabe index (conditional complexity)

  static repeat(items, identify, callback) {
    if (arguments.length === 2) {
      callback = identify;
      identify = null;
    }
    if (!Array.isArray(items)) {
      throw new Error(`Unexpected repeat items "${items}" provided, expected an array.`);
    }
    if (arguments.length !== 2 && typeof identify !== 'function') {
      throw new Error(`Unexpected repeat identify "${identify}" provided, expected a function.`);
    } else if (typeof callback !== 'function') {
      throw new Error(`Unexpected repeat callback "${callback}" provided, expected a function.`);
    }
    return identify
      ? items.map((...args) => [identify(...args), callback(...args)])
      : items.map((...args) => callback(...args)); // Just a basic array.
  }