ptorrel/JS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Browse Source
This commit is contained in:
Philippe Torrel
2026-07-07 10:29:34 +02:00
parent f3ca79e09b
commit f583bf92a3
14 changed files with 201 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

80
02_advanced/uebungen/#u14_avg-scores/index.html Normal file
View File

@@ -0,0 +1,80 @@
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Übung 14: Durchschnittsnoten berechnen</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<main>
<div class="container py-5">
<div class="alert alert-primary">
<h2>Übung 14: Durchschnittsnoten berechnen</h2>
<p>
Durchschnitt pro Schüler (<strong>calculateAvgGrades</strong>): Schreibe eine Funktion, die die
Durchschnittsnote jedes Schülers (zeilenweise) berechnet. Das Ergebnis soll ein Array mit den
Durchschnittswerten der Schüler (Anna, Ben, Clara, David) sein.
</p>
<p>
Durchschnitt pro Fach (<strong>calculateAvgSubjects</strong>): Schreibe eine Funktion, die die
Durchschnittsnote jedes Fachs (spaltenweise) berechnet. Das Ergebnis soll ein Array mit den
Durchschnittswerten der Fächer (Mathematics, English, Biology, History) sein.
</p>
<div class="output alert alert-secondary my-3"></div>
</div>
</div>
</main>
<script>
'use strict';
const outputEl = document.querySelector('.output');
const gradesTable = [
['Name', 'Mathematics', 'English', 'Biology', 'History'],
['Anna', 85, 92, 78, 88],
['Ben', 90, 88, 84, 79],
['Clara', 76, 95, 89, 91],
['David', 82, 79, 91, 85],
];
const calculateAverageGrades = (ar = []) => {
return ar.slice(1).map((row) => {
const grades = row.slice(1); // => [85, 92, 78, 88]
const avgGrades = grades.reduce((a, b) => a + b, 0) / grades.length;
return Number(avgGrades.toFixed(2));
});
};
// [].reduce((INDEX_A, INDEX_B) => {}, INITIAL_VALUE)
console.log(
[85, 92, 78, 88].reduce((sum, n) => {
return Number(sum) + Number(n);
}, 0),
); // => 343
const calculateAvgSubjects = (ar = []) => {
const entries = ar.slice(1);
const grades = entries.map((ar) => ar.slice(1));
console.log(grades);
// [
// []
// [85, 92, 78, 88]
// [90, 88, 84, 79]
// [76, 95, 89, 91]
// [82, 79, 91, 85]
// ]
const results = grades.reduce((resAr, nAr) => {
resAr.push(nAr[0]);
return resAr;
}, []);
console.log(results);
};
console.log(calculateAvgSubjects(gradesTable));
console.log(calculateAverageGrades(gradesTable));
outputEl.textContent = `Average grades of students are: ${calculateAverageGrades().join(' - ')}`;
</script>
</body>
</html>

39
02_advanced/uebungen/u14_avg-scores/index.html
View File

@@ -1,39 +0,0 @@
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Übung 14: Durchschnittsnoten berechnen</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<main>
<div class="container py-5">
<div class="alert alert-primary">
<h2>Übung 14: Durchschnittsnoten berechnen</h2>
<p>
Schreibe eine Funktion <code>calculateAverageGrades</code>, die die Durchschnittsnote jedes Schülers (ohne
den Namen) berechnet und als neues Array zurückgibt.
</p>
<p>
Die Funktion <code>calculateAverageGrades</code> soll die Durchschnittsnoten jedes Schülers berechnen, indem
sie die Noten in den Fächern zusammenzählt und durch die Anzahl der Fächer teilt. Runde die
Durchschnittswerte auf zwei Dezimalstellen.
</p>
</div>
</div>
</main>
<script>
'use strict';
const gradesTable = [
['Name', 'Mathematics', 'English', 'Biology', 'History'],
['Anna', 85, 92, 78, 88],
['Ben', 90, 88, 84, 79],
['Clara', 76, 95, 89, 91],
['David', 82, 79, 91, 85],
];
</script>
</body>
</html>

24
02_advanced/uebungen/u15_shopping-list/index.html
View File

@@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
@@ -33,6 +33,28 @@
];
// Your code here
shoppingList[0][2] = 'Grapes';
shoppingList[1][2] = 'Tomatoes';
shoppingList[2][2] = 'Butter';
// Your code here
const changeShoppingList = (arr, changeList = ['Grapes', 'Tomatoes', 'Butter']) => {
return arr.map((elems, idx) => {
elems[2] = changeList[idx];
return elems;
});
};
const newItems = ['Grapes', 'Tomatoes', 'Butter'];
shoppingList.forEach((categories, index) => {
categories.splice(2, 1, newItems[index]);
});
console.log(shoppingList);
console.log(changeShoppingList(shoppingList));
console.log(shoppingList);
</script>
</body>
</html>

10
02_advanced/uebungen/u16_geoquiz/index.html
View File

@@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
@@ -36,7 +36,13 @@
['Russia', 'Moscow'],
];
const getCapitalOf = () => {};
const getCapitalOf = (country) => {
return countriesWithCapital.find((elemArr) => {
return elemArr[0] === country;
})[1];
};
console.log(getCapitalOf('Switzerland')); // => 'Bern'
</script>
</body>
</html>

9
02_advanced/uebungen/u17_inventory-modification/index.html
View File

@@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
@@ -40,7 +40,10 @@
];
// Your code here
inventory.push([
['Shelf 1', 'Novels', 40],
['Shelf 2', 'Non-fiction', 35],
]);
console.log(inventory);
/* Expected outcome:
[
@@ -62,8 +65,6 @@
],
]
*/
// Your code here
</script>
</body>
</html>

5
02_advanced/uebungen/u18_3d-array-selection/index.html
View File

@@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
@@ -45,7 +45,8 @@
];
// Your code here
inventory[1][1][2] -= 5;
inventory[1][1][2] = 25;
console.log(inventory);
/*
Expected outcome:

42
02_advanced/uebungen/u19_brightness-increase/index.html
View File

@@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
@@ -27,7 +27,9 @@
<script>
'use strict';
const image = [
'use strict';
const imageAr = [
[
// Row 1
[100, 150, 200], // Pixel 1
@@ -40,12 +42,44 @@
],
];
const increaseBrightness = (image, value) => {
const increaseBrightness = (imageAr = [], value) => {
// Your code here
return imageAr.map((row) => {
return row.map((rgbValue) => {
return rgbValue.map((elem) => {
const result = elem + value;
if (result > 255) {
return 255;
}
return result;
});
});
});
};
const newImage = increaseBrightness(image, 30);
const increaseBrightness2 = (image, value) => {
const imageAr = image.map((row) => {
const rows = row.map((pixel) => {
const pixels = pixel.map((color) => {
return Math.min(255, color + value);
});
return pixels;
});
return rows;
});
return imageAr;
};
console.time('guard');
const newImage = increaseBrightness(imageAr, 30);
console.log(newImage);
console.timeEnd('guard');
console.time('Math');
const newImage2 = increaseBrightness2(imageAr, 30);
console.log(newImage2);
console.timeEnd('Math');
/*
Expected outcome:
[

10
02_advanced/uebungen/u20_geoquiz-2/index.html
View File

@@ -1,4 +1,4 @@
<!DOCTYPE html>
<!doctype html>
<html lang="de">
<head>
<meta charset="UTF-8" />
@@ -35,7 +35,13 @@
['Russia', 'Moscow'],
];
const getCountryForCapital = () => {};
const getCountryFor = (capital) => {
return countriesWithCapital.find((elemArr) => {
return elemArr[1] === capital;
})[0];
};
console.log(getCountryFor('Paris')); // => 'France'
</script>
</body>
</html>