ObjectsStudio

Author: LanceOx

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}/objects-and-math/chapter-examples/KindnessSelection.js"
+        }
+    ]
+}

objects-and-math/chapter-examples/KindnessSelection.js

@@ -7,11 +7,19 @@ function randomSelection(arr){
 
  let words = ['Hello', 'World', 'Python', 'JavaScript', 'Rutabaga'];
 
- for (i=0; i < 8; i++){
-   console.log(randomSelection(happiness));
-   //console.log(randomSelection(words))  
- }
+//  for (i=0; i < 8; i++){
+//    console.log(randomSelection(happiness));
+//    //console.log(randomSelection(words))  
+//  }
+ let randomArr = randomSelection([happiness, words]);
 
+  for (let i=0; i < 2; i++) {
+    console.log(randomSelection(randomArr));
+ }
+    let newArr = [];
+      newArr.push(randomSelection(happiness));
+      newArr.push(randomSelection(words));
+      console.log(newArr);
  //Experiment with the code above. Try to:
  //a) Print 3 random selections from each array.
  //b) Have the code randomly pick one array, and then print 2 random items from it.

objects-and-math/studio/ObjectsStudio01.js

@@ -1,8 +1,21 @@
 // Code your selectRandomEntry function here:
-
+function selectRandomEntry(arr){
+  return
+  arr[Math.floor(Math.random()*arr.length)];
+}
 
 // Code your buildCrewArray function here:
-
+function buildCrewArray(candidates, ids){
+  let crew = [];
+  for(let i=0; i<candidates.length; i++){
+    for(let j=0; j<ids.length; j++){
+      if(candidates[i].astronautID === ids[j]){
+        crew.push(candidates[i]);
+      }
+    }
+  }
+  return crew;
+}
 
 let idNumbers = [291, 414, 503, 599, 796, 890];
 
@@ -53,3 +66,18 @@ let candidateF = {
 let animals = [candidateA,candidateB,candidateC,candidateD,candidateE,candidateF];
 
 // Code your template literal and console.log statements:
+let candidates = [selectRandomEntry(animals), 
+  selectRandomEntry(animals),
+   selectRandomEntry(animals)];
+   let randomIds = [];
+while(randomIds.length < 3){
+  let id = selectRandomEntry(idNumbers);
+  if(!randomIds.includes(id)){
+    randomIds.push(id);
+  }
+}
+let crew = buildCrewArray(animals, randomIds);
+
+console.log(`${crew[0].name},
+ ${crew[1].name},
+  ${crew[2].name} are going to space!`);

objects-and-math/studio/ObjectsStudio02.js

@@ -1,14 +1,27 @@
 // Code your orbitCircumference function here:
-
-
+function orbitCircumference (radius) {
+  return Math.round(2*Math.PI*radius)
+};
+//console.log(orbitCircumference(2000));
 // Code your missionDuration function here:
-
-
+function missionDuration (numOrbits, orbitRadius = 2000, orbitalSpeed = 28000)  {
+ let totalKM = numOrbits * orbitCircumference(orbitRadius);
+ let totalTime =  Math.round(((numOrbits * orbitCircumference(orbitRadius))/ orbitalSpeed) * 100)/100; 
+return totalTime;
+//console.log(`The mission will travel ${totalKM} km around the planet, and it will take ${totalTime} hours to complete.`);
+}
 // Copy/paste your selectRandomEntry function here:
-
+function selectRandomEntry(arr){
+  return arr[Math.floor(Math.random()*arr.length)];
+}
 
 // Code your oxygenExpended function here:
+function oxygenExpended(astro,orbitRadius =2000, orbitalSpeed =28000) {
+  let walkDur = missionDuration(3,orbitRadius,orbitalSpeed);
+  let o2 = Math.round((astro.o2Used(walkDur))*1000)/1000;
 
+  return `${astro.name} will perform the spacewalk, which will last ${walkDur} hours and require ${o2} kg of oxygen.`
+}
 
 // Candidate data & crew array.
 let candidateA = {
@@ -55,4 +68,5 @@ let candidateA = {
  };
 
  let crew = [candidateA,candidateC,candidateE];
- 
+ 
+ console.log(oxygenExpended(candidateB));