Homework 3 underscore map.js description

gistfile1.txt

var _ = {   ///<-- This is the creation of a variable called "_" which is a method
  map: function(list, cbFn) { ///<-- on this line the first key value is function (so a function within the variable method). This function will take to params: list and cbFn
    var newArray = [];  /// within the method's function, there is a new local variable, newArray, which is an empty array
    list.forEach(function(elem, index) {   ///<-- on this line we're showing each element/item created by the parameter "list"
      var newElem = cbFn(elem, index);  ///<-- creating a new variable using the CbFn parameter and the elements and index generated by the list function
      newArray.push(newElem); /// <-- the newArray variable is using the push vanilla JS method to create an array using the dynamic variables created by newElem
    }); ///<-- this is closing the list.forEach function
    
    return newArray; ///<-- this is the final result of the newArray varaible created by the nested function
  } ///<-- this is closing the map keyword and function
}; ///<-- this is closing the var _ represents
 
_.map([1, 2, 3], function(num){ return num * 3; }); ///<-- this shows the result of the _ variable .map takes 3 objects within an array, converts them using a number parameter, multiplies them by three and generates a new array based on the new results.

https://gist.github.com/donoage/c59c0e9cd9f1c660fe6526cb2c9f8cf6

Hey Rachel,

See my link above. My comments start with // Stephen: . Check out how I would explain each line and your explanation.
A few things as well,

• Put your // comments above your code.
• // Commenting in JS is 2 slashes not 3.
• No need for <--

3/4. I think you're almost there!