finished array methods and callbacks

index.js

@@ -6,17 +6,20 @@ const { fifaData } = require('./fifa.js')
 Practice accessing data by console.log-ing the following pieces of data note. 
 
 💡 HINT: You may want to filter the data first 😉*/
-
+const finals2014 = fifaData.filter(function(item){
+    return item.Year === 2014 && item.Stage === `Final`;
+});
+console.log(finals2014);
 //(a) Home Team name for 2014 world cup final
-
+console.log(`task 1a`, finals2014[0][`Home Team Name`]);
 //(b) Away Team name for 2014 world cup final
-
+console.log(`task 1b`,finals2014[0][`Away Team Name`]);
 //(c) Home Team goals for 2014 world cup final
-
+console.log(`task 1c`,finals2014[0][`Home Team Goals`]);
 //(d) Away Team goals for 2014 world cup final
-
+console.log(`task 1d`,finals2014[0][`Away Team Goals`]);
 //(e) Winner of 2014 world cup final */
-
+console.log(`task 1e`, finals2014[0][`Win conditions`]);
 
 /* 🚀🚀🚀🚀🚀🚀🚀🚀🚀🚀 Task 2: 🚀🚀🚀🚀🚀🚀🚀🚀🚀🚀 
 Use getFinals to do the following:
@@ -26,10 +29,13 @@ Use getFinals to do the following:
 💡 HINT - you should be looking at the stage key inside of the objects
 */
 
-function getFinals(/* code here */) {
-    /* code here */
+function getFinals(data) {
+    const allFinals = data.filter(function(item){
+        return item.Stage === `Final`;
+    })
+    return allFinals;
  }
-
+console.log(getFinals(fifaData));
 
 
 /* 🚀🚀🚀🚀🚀🚀🚀🚀🚀🚀 Task 3: 🚀🚀🚀🚀🚀🚀🚀🚀🚀🚀
@@ -38,10 +44,10 @@ Use the higher-order function called getYears to do the following:
 2. Receive a callback function as the second parameter that will take getFinals from task 2 as an argument
 3. Return an array called years containing all of the years in the getFinals data set*/
 
-function getYears(/* code here */) {
-    /* code here */
+function getYears(data, getFinalsCB) {
+    return getFinalsCB(data).map(item => item.Year);
 }
-
+console.log(getYears(fifaData, getFinals));
 
 
 /* 🚀🚀🚀🚀🚀🚀🚀🚀🚀🚀 Task 4: 🚀🚀🚀🚀🚀🚀🚀🚀🚀🚀
@@ -52,9 +58,10 @@ Use the higher-order function getWinners to do the following:
 💡 HINT: Don't worry about ties for now (Please see the README file for info on ties for a stretch goal.)
 4. Returns the names of all winning countries in an array called `winners` */ 
 
-function getWinners(/* code here */) {
-    /* code here */
+function getWinners(data, getFinalsCB){
+    return getFinalsCB(data).map(item => item[`Home Team Goals`] > item [`Away Team Goals`] ? item [`Home Team Name`] : item[`Away Team Name`]);
 }
+console.log(`task 4`, getWinners(fifaData, getFinals));
 
 
 
@@ -69,9 +76,12 @@ Use the higher-order function getWinnersByYear to do the following:
 💡 HINT: the strings returned need to exactly match the string in step 4.
  */
 
-function getWinnersByYear(/* code here */) {
-    /* code here */
+function getWinnersByYear(data, getFinals, getYearsCB, getWinnersCB) {{
+    const winners = getWinnersCB(data, getFinals);
+    const years = getYearsCB(data, getFinals);
+    return winners.map((item, index)=> `In ${years[index]}, ${item} won the world cup!`)
 }
+console.log(getWinnersByYear(fifaData, getYears, getWinners))}
 
 
 
@@ -89,10 +99,13 @@ Use the higher order function `getAverageGoals` to do the following:
 
 */
 
-function getAverageGoals(/* code here */) {
-    /* code here */
+function getAverageGoals(data) {
+    const averageHomeGoals = data.reduce(function(acc, item){
+        return acc + item [`Home Team Goals`] + item[`Away Team Goals`];
+    }, 0)
+    return (averageHomeGoals / data.length).toFixed(2);
  }
-
+console.log(`task 6`, getAverageGoals(fifaData));