Question

JavaScript

1) The function "hill" is implemented as follows:

function hill(x) {
return -2 * (x - 4) * (x - 16);
}

Write a function called quadratic that takes a constant factor and two roots and returns an anonymous function that computes that curve. In other words, quadratic(-2,4,16) should return an anonymous function that behaves the same as hill.

2) The function wrapString(inString, tag) is implemented as follows, so wrapString('foo','em') would return"<em>foo</em>"`:

function wrapString(inString, tag){
return "<" + tag + ">"+ inString + "</" + tag + ">";
}

Write a function called makeWrapper(tag) that returns a one-argument anonymous function that wraps a string with the given tag.

Write a function called wrapStrings that takes an array of strings and a tag (a string), and returns an array of strings where each is wrapped with the given tag. Use the map() method and the makeWrapper function.

Answer 1

Solution:)

   function quadratic(a,b,c){   
   return function(x){  

   return a * (x   - b) * (x - c);

   }
   }

function makeWrapper(tag){

   return function(inString){
       return "<" + tag + ">"+ inString + "</" + tag + ">";

   }

}

function wrapStrings(strings,tag){

  
   return strings.map(makeWrapper(tag));

}