src/main/sharedResource.js

/**
* pick -> shorthand for document.querySelector(selector)
*/
//export const pick = (selector) => document.querySelector(selector);

/**
* indexed -> takes a list of indices and gets them from a 
*   collection
* @param{Array::Numbers} (indices) -> index list
* @param{Array::Arrays/Objects} (collection) -> collection to get 
*   values
* @param{Function} (getProperty) -> callback to get value from
*   collection
* @return{Array/Array::Objects/Array::Array}
*/
// export function indexed(indices, collection, getProperty) {
//   let request = new Array(indices.length);

//   if (arguments.length === 2){
//       indices.forEach( (collectionIndex, i) => {
//         request[i] = collection[collectionIndex];
//       });
      
//   } else {
//       indices.forEach( (collectionIndex, i) => {
//         request[i] = getProperty(collection[collectionIndex]);
//       });
//   }

//   return request;
// };

/**
* Queue -> very very basic queue
* @ignore
*/
export class Queue {
  constructor() {
    this.__queue__ = new Array();
    this.length = this.__queue__.length;
  }
  
  setLength() {
    this.length = this.__queue__.length;
  }

  dequeue() {
    let value = this.__queue__.shift();
    this.setLength();
    return value;
  }

  enqueue(x) {
    this.__queue__.push(x);
    this.setLength();
  }
}

// check if string is in the selected array
// export function inArray(str, arr) {
//   for (var i = 0; i < arr.length; i++){
//     let word = arr[i]
//     if (str.toLowerCase() === word.toLowerCase()) {
//       return true
//     }  
//   }
// }

/**
* @ignore
*/
export function isEmpty(obj) {
  return Object.keys(obj).length === 0 ||
    obj.length === 0;
}