@skiff-org/trawler/src/common.js

A modern search library for Skiff

export function parse_option(value, default_value){
  return typeof value !== 'undefined' ? value : default_value;
}

/**
 * @param {!number} count
 * @returns {Array<Object>}
 */

export function create_object_array(count){
  const array = new Array(count);

  for(let i = 0; i < count; i++){
    array[i] = create_object();
  }

  return array;
}

export function create_arrays(count){
  const array = new Array(count);

  for(let i = 0; i < count; i++){
    array[i] = [];
  }

  return array;
}

/**
 * @param {!Object} obj
 * @returns {Array<string>}
 */

export function get_keys(obj){
  return Object.keys(obj);
}

export function create_object(){
  return Object.create(null);
}

export function concat(arrays){
  return [].concat.apply([], arrays);
}

export function sort_by_length_down(a, b){
  return b.length - a.length;
}

export function is_array(val){
  return val.constructor === Array;
}

export function is_string(val){
  return typeof val === 'string';
}

export function is_object(val){
  return typeof val === 'object';
}

export function is_function(val){
  return typeof val === 'function';
}