jeffrey.js

repl.it
ei-eval-retake
// =====================================================
// 1.
// Write a function called `doubleIt` which accepts a `num` 
// parameter (type: number) and returns double the provided number

// Test #1
const result1 = doubleIt(10);
 console.log(result1);  // => 20
// =====================================================
function doubleIt(num){
 return num *2
}

// =====================================================
// 2.
// Write a function called `trunkIt` which accepts a `words`
// parameter (type: string) and returns a string where everything
// after the tenth character is removed and replaced with "..."
//
// HINT: The .slice() method and concatenation will be useful here

// Test #2
const result2 = trunkIt("How much wood would a woodchuck chuck?");
 console.log(result2);  // => "How much w..."
// =====================================================
function trunkIt(words){
  return words.slice(0,10)+"..."
  
}


// =====================================================
// 3.
// Write a function called `shoutThem` that accepts a `words` parameter 
// (type: array) and returns a new array where all the elements have 
// been transformed to ALL UPPERCASE. 

// Test #3
 const result3 = shoutThem(['how', 'now', 'brown', 'cow']);
 console.log(result3);  // => ['HOW', 'NOW', 'BROWN', 'COW']
// =====================================================
/*function shoutThem(words){
  const arr =[]
  for(i=0;i<words.length;i++){
  arr.push(words[i].toUpperCase());
  }
  return arr
}
*/

// =====================================================
// 4.
// If you used a loop to solve the problem above, now use the Array
// .map() method, or vice versa.
// =====================================================
function shoutThem(words){
  return words.map(function(a){
   return a.toUpperCase();
  })
}

// =====================================================
// 5.
// Write a function called `evalStudents` that accepts a `students`
// parameter (type: array of objects). Each object has the following
// structure:
//
// { name: 'john', credits: 71, graduated: false }
//
// Your function should check the `credits` prop on each student object.
// If the value is greater than or equal to 90, set the `graduated` prop
// to true. Otherwise, do nothing.

// Test #5
const students = [
   { name: 'john', credits: 71, graduated: false },
  { name: 'laura', credits: 95, graduated: false },
   { name: 'rich', credits: 36, graduated: false },
   { name: 'tauhida', credits: 90, graduated: false }
 ];
 function evalStudents(students){
   for(i=0;i<students.length;i++)
   if(students[i].credits>=90){
      students[i].graduated = true;
   }
 }
 evalStudents(students);
 console.log(students);
// =====================================================