Objects Studio

Author: Lbeckap

objects-and-math/studio/ObjectsStudio01.js

@@ -1,7 +1,39 @@
 // Code your selectRandomEntry function here:
+function selectRandomEntry (arr) {
+  let index = Math.floor(Math.random() * arr.length);
+  return arr[index];
+}
 
+function selectThreeRandomIDs () {
+  let randomlySelectedIDs = [];
+  
+  for (let i = 0; i < 3; i++) {
+    let randomEntry = selectRandomEntry(idNumbers);
+    while (randomlySelectedIDs.includes(randomEntry)) {
+      randomEntry = selectRandomEntry(idNumbers);
+    }
+    randomlySelectedIDs.push(randomEntry);
+  }
+    return randomlySelectedIDs;
+  }
 
 // Code your buildCrewArray function here:
+function buildCrewArray (arrSelectRandomIDs, arrAllCandidates) {
+  let crew = [];
+
+  arrAllCandidates.forEach(element => {
+    for (let i = 0; i < arrSelectRandomIDs.length; i++) {
+      if (element.astronautID === arrSelectRandomIDs[i]) {
+        crew.push(element.astronautID);
+      } else {
+
+      }
+    }
+  });
+  
+  let selectedCrewMsg = `${crew[0]}, ${crew[1]}, and ${crew[2]} are going to space!`;
+  return crew, selectedCrewMsg;
+}
 
 
 let idNumbers = [291, 414, 503, 599, 796, 890];
@@ -53,3 +85,6 @@ let candidateF = {
 let animals = [candidateA,candidateB,candidateC,candidateD,candidateE,candidateF];
 
 // Code your template literal and console.log statements:
+
+//console.log(selectThreeRandomIDs());
+console.log(buildCrewArray(selectThreeRandomIDs(), animals));

objects-and-math/studio/ObjectsStudio02.js

@@ -1,14 +1,29 @@
 // Code your orbitCircumference function here:
-
+const orbitCircumference = function() {
+  return 2 * (Math.PI) * 2000;
+}
 
 // Code your missionDuration function here:
-
+function missionDuration(numOfOrbits = 5, orbitRadius = 2000, orbitalSpeed = 28000) {
+let time = (orbitCircumference() * numOfOrbits) / orbitalSpeed;
+time = (Math.round(time * 100) / 100);
+let resultMsg = `The mission will travel ${orbitCircumference() * numOfOrbits} km around the planet, and it will take ${time} hours to complete.`
+console.log(resultMsg); //? Should I refactor to log message outside the function?
+  return time;
+}
 
 // Copy/paste your selectRandomEntry function here:
-
+function selectRandomEntry (arr) {
+  let index = Math.floor(Math.random() * arr.length);
+  return arr[index];
+}
 
 // Code your oxygenExpended function here:
-
+function oxygenExpended (candidate, orbitalSpeed = 28000, orbitRadius = 2000) {
+  let time = missionDuration(3, orbitRadius, orbitalSpeed);
+  let result = `${candidate.name} will perform the spacewalk, which will last ${time} hours and require ${candidate.o2Used(time)} kg of oxygen.`;
+  return result;
+}
 
 // Candidate data & crew array.
 let candidateA = {
@@ -54,5 +69,10 @@ let candidateA = {
    'astronautID':890
  };
 
- let crew = [candidateA,candidateC,candidateE];
- 
+ let crew = [candidateA,candidateB,candidateC,candidateD,candidateE,candidateF];
+ 
+console.log(orbitCircumference());
+//onsole.log(missionDuration());
+console.log(oxygenExpended(selectRandomEntry(crew)));
+
+//console.log(crew[0]);

objects-and-math/studio/ObjectsStudio03.js

@@ -1,8 +1,32 @@
 // Code your crewMass function here:
+const crewMass = function (selectedCrew) {
+  let totalCrewMass = 0;
 
+  for (let i = 0; i < selectedCrew.length; i++) {
+    totalCrewMass += selectedCrew[i].mass;
+  }
+  return Math.round(totalCrewMass * 10) / 10;
+};
 
 // Code your fuelRequired function here:
+function fuelRequired (totalMassOfCrew, selectedCrew) {
+  const massOfRocket = 75000;
+  const fuelToLiftOnekg = 9.5;
+  let totalMass = massOfRocket + totalMassOfCrew;
+  let fuelNeededForLEO = totalMass * fuelToLiftOnekg;
 
+  for (let i = 0; i < selectedCrew.length; i++) {
+    if (selectedCrew[i].species === 'cat' || selectedCrew[i].species === 'dog') {
+      totalMass += 200
+    } else {
+      totalMass += 100;
+    }
+  }
+
+  let result = `The mission has a launch mass of ${Math.ceil(totalMass)} kg and requires ${fuelNeededForLEO} kg of fuel.`;
+  return result;
+
+}
 
 // The pre-selected crew is in the array at the end of this file.
 // Feel free to add, remove, or switch crew members as you see fit.
@@ -51,4 +75,6 @@ let candidateA = {
  };
 
  let crew = [candidateB,candidateD,candidateF];
- 
+ 
+ //console.log(crewMass(crew));
+ console.log(fuelRequired(crewMass(crew), crew));