Array.prototype extensions

array.js

Object.defineProperty( // eslint-disable-line
  Array.prototype, 'flatMap', {
    value: function (mapFunction) {
      return Array.prototype.concat.call([], ...this.map(mapFunction))
    }
  }
)

Object.defineProperty( // eslint-disable-line
  Array.prototype, 'tap', {
    value: function (callable) {
      callback && typeof callable === 'function' && callable([...this])
      return this
    }
  }
)

Object.defineProperty( // eslint-disable-line
  Array.prototype, 'debug', {
    value: function (label = null) {
      return this.tap(a => label ? console.log(label, a) : console.log(a))
    }
  }
)

Object.defineProperty( // eslint-disable-line
  Array.prototype, 'unique', {
    value: function () {
      return [...(new Set(this))]
    }
  }
)