RecipeFraction

Problem Statement

Definition

Class:

RecipeFraction

Method:

getFraction

Parameters:

String[], String[]

Returns:

double

Method signature:

double getFraction(String[] recipe, String[] ingredients)

(be sure your method is public)

Notes

• The return value must be within 1e-9 absolute or relative error of the actual result.

Constraints

• ingredients will contain between 1 and 50 elements inclusive.
• Each element of ingredients will contain between 1 and 50 characters inclusive.
• Each element of ingredients will contain only uppercase letters ('A'-'Z').
• Each element of ingredients will be distinct.
• recipe will contain between 1 and 50 elements inclusive.
• Each element of recipe will contain between 3 and 50 characters inclusive.
• Each element of recipe will have the format (quotes for clarity) "Amount Ingredient" where Amount is an integer with no leading zeros between 1 and 10 inclusive, and Ingredient is a positive length string of uppercase letters.
• Each Ingredient in recipe will be distinct.

Examples

1. {"2 GRAPES",
    "1 APPLES",
    "3 STRAWBERRIES"}

   {"APPLES"}

   Returns: 0.16666666666666666

   The recipe requires 2+1+3 = 6 total units. APPLES account for 1/6 of the total.

2. {"2 GRAPES",
    "1 APPLES",
    "3 STRAWBERRIES"}

   {"GRAPES"}

   Returns: 0.3333333333333333

   GRAPES account for 2/6 of the total recipe.

3. {"2 GRAPES",
    "1 APPLES",
    "3 STRAWBERRIES"}

   {"FROGS"}

   Returns: 0.0

   There are no FROGS in our recipe.

4. {"1 A","1 B","1 C","5 D","4 E"}

   {"A","E"}

   Returns: 0.4166666666666667

   The recipe requires 1+1+1+5+4=12 total units. A and E account for 1+4=5 of these 12.

5. {"9 A","1 B","10 C","5 D","4 E"}

   {"A","B","F"}

   Returns: 0.3448275862068966