JavaScript ports of various python modules.

Deque.js

export class Deque {
  constructor(iterable, maxLen = null) {
    this.iterable = iterable;
    this.maxLen = maxLen;
  }
  
  append(value) {}
  appendLeft(value) {}
  clear() {}
  copy() {}
  count(value) {}
  extend(iterable) {}
  extendLeft(iterable) {}
  index(value, start, stop) {}
  insert(i, x) {}
  pop() {}
  popLeft() {}
  remove(value) {}
  reverse() {}
  rotate(n) {}
}

NamedTuple.js

/**
 * @param {string} typeName
 * @param {string|string[]} fieldNames
 * @param {boolean} [rename=false]
 * @param {*[]} [defaults=null]
 */
export function namedTuple(typeName, fieldNames, rename = false, defaults = []) {
  // Vailidation
  
  
  // Construction
  class NamedTuple {
    constructor(...args) {
      for(let i = 0; i < fieldNames.length; i++) {
        this[fieldNames[i]] = args[i] || defaults[i] || null;
      }
    }
  
    static get fields() {
      return fieldNames;
    }
    
    replace(...args) {
      if(typeof args[0] === 'object') {
       let options = args[0];
       for(let key of Object.keys(options)) {
        if(fieldNames.indexOf(key) > -1) {
          this[key] = options[key]
        }
       }
      } else {
        for(let i = 0; i < fieldNames.length; i++) {
          this[fieldNames[i]] = args[i] || defaults[i] || this[fieldNames[i]];
        }
      }
      
      return this;
    }
    
    toString() {
      return `${this.constructor.name}(${fieldNames.map((field) => `${field}=${this[field]}`).join(', ')})`;
    }
  }
  
  Object.defineProperty(NamedTuple, 'name', {value: typeName});
  
  return NamedTuple;
};