array methods

MyArray.js

'use strict'
class MyArray {
  constructor(arr){this.arr = arr}
  
  filter(shouldKeepFunc){
     let newArray = []
      
     for (let i = 0; i < this.arr.length; i++) {
       let item = this.arr[i]
       if(shouldKeepFunc(item)){
        newArray.push(item)
       }
     }
     return newArray
  }
  map(mapperFunc){
     let newArray = []
     for (let i = 0; i < this.arr.length; i++) {
       let item = this.arr[i]
       newArray.push(mapperFunc(item))
     }
     return newArray
  }

  forEach(mapperFunc){
     for (let i = 0; i < this.arr.length; i++) {
       let item = this.arr[i]
       mapperFunc(item)
     }
  }
}
}

module.exports = MyArray