EjS Ch. 5, Ex. 2

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Brendan Moran
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  1. EjS Ch. 5, Ex. 2 Previews
  2. EjS Ch. 5, Ex. 2 HTML Codes
  3. EjS Ch. 5, Ex. 2 JS Codes

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What is a ejs ch. 5, ex. 2? How do you make a ejs ch. 5, ex. 2? This script and codes were developed by Brendan Moran on 28 November 2022, Monday.

EjS Ch. 5, Ex. 2 Previews
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EjS Ch. 5, Ex. 2 - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>EjS Ch. 5, Ex. 2</title>
</head>
<body> <script src="js/index.js"></script>
</body>
</html>

EjS Ch. 5, Ex. 2 - Script Codes JS Codes

var ancestry = [ { name: "Carolus Haverbeke", sex: "m", born: 1832, died: 1905, father: "Carel Haverbeke", mother: "Maria van Brussel"
}, { name: "Emma de Milliano", sex: "f", born: 1876, died: 1956, father: "Petrus de Milliano", mother: "Sophia van Damme"
}, { name: "Maria de Rycke", sex: "f", born: 1683, died: 1724, father: "Frederik de Rycke", mother: "Laurentia van Vlaenderen"
}, { name: "Jan van Brussel", sex: "m", born: 1714, died: 1748, father: "Jacobus van Brussel", mother: "Joanna van Rooten"
}, { name: "Philibert Haverbeke", sex: "m", born: 1907, died: 1997, father: "Emile Haverbeke", mother: "Emma de Milliano"
}, { name: "Jan Frans van Brussel", sex: "m", born: 1761, died: 1833, father: "Jacobus Bernardus van Brussel", mother: null
}, { name: "Pauwels van Haverbeke", sex: "m", born: 1535, died: 1582, father: "N. van Haverbeke", mother: null
}, { name: "Clara Aernoudts", sex: "f", born: 1918, died: 2012, father: "Henry Aernoudts", mother: "Sidonie Coene"
}, { name: "Emile Haverbeke", sex: "m", born: 1877, died: 1968, father: "Carolus Haverbeke", mother: "Maria Sturm"
}, { name: "Lieven de Causmaecker", sex: "m", born: 1696, died: 1724, father: "Carel de Causmaecker", mother: "Joanna Claes"
}, { name: "Pieter Haverbeke", sex: "m", born: 1602, died: 1642, father: "Lieven van Haverbeke", mother: null
}, { name: "Livina Haverbeke", sex: "f", born: 1692, died: 1743, father: "Daniel Haverbeke", mother: "Joanna de Pape"
}, { name: "Pieter Bernard Haverbeke", sex: "m", born: 1695, died: 1762, father: "Willem Haverbeke", mother: "Petronella Wauters"
}, { name: "Lieven van Haverbeke", sex: "m", born: 1570, died: 1636, father: "Pauwels van Haverbeke", mother: "Lievijne Jans"
}, { name: "Joanna de Causmaecker", sex: "f", born: 1762, died: 1807, father: "Bernardus de Causmaecker", mother: null
}, { name: "Willem Haverbeke", sex: "m", born: 1668, died: 1731, father: "Lieven Haverbeke", mother: "Elisabeth Hercke"
}, { name: "Pieter Antone Haverbeke", sex: "m", born: 1753, died: 1798, father: "Jan Francies Haverbeke", mother: "Petronella de Decker"
}, { name: "Maria van Brussel", sex: "f", born: 1801, died: 1834, father: "Jan Frans van Brussel", mother: "Joanna de Causmaecker"
}, { name: "Angela Haverbeke", sex: "f", born: 1728, died: 1734, father: "Pieter Bernard Haverbeke", mother: "Livina de Vrieze"
}, { name: "Elisabeth Haverbeke", sex: "f", born: 1711, died: 1754, father: "Jan Haverbeke", mother: "Maria de Rycke"
}, { name: "Lievijne Jans", sex: "f", born: 1542, died: 1582, father: null, mother: null
}, { name: "Bernardus de Causmaecker", sex: "m", born: 1721, died: 1789, father: "Lieven de Causmaecker", mother: "Livina Haverbeke"
}, { name: "Jacoba Lammens", sex: "f", born: 1699, died: 1740, father: "Lieven Lammens", mother: "Livina de Vrieze"
}, { name: "Pieter de Decker", sex: "m", born: 1705, died: 1780, father: "Joos de Decker", mother: "Petronella van de Steene"
}, { name: "Joanna de Pape", sex: "f", born: 1654, died: 1723, father: "Vincent de Pape", mother: "Petronella Wauters"
}, { name: "Daniel Haverbeke", sex: "m", born: 1652, died: 1723, father: "Lieven Haverbeke", mother: "Elisabeth Hercke"
}, { name: "Lieven Haverbeke", sex: "m", born: 1631, died: 1676, father: "Pieter Haverbeke", mother: "Anna van Hecke"
}, { name: "Martina de Pape", sex: "f", born: 1666, died: 1727, father: "Vincent de Pape", mother: "Petronella Wauters",
}, { name: "Jan Francies Haverbeke", sex: "m", born: 1725, died: 1779, father: "Pieter Bernard Haverbeke", mother: "Livina de Vrieze",
}, { name: "Maria Haverbeke", sex: "m", born: 1905, died: 1997, father: "Emile Haverbeke", mother: "Emma de Milliano"
}, { name: "Petronella de Decker", sex: "f", born: 1731, died: 1781, father: "Pieter de Decker", mother: "Livina Haverbeke"
}, { name: "Livina Sierens", sex: "f", born: 1761, died: 1826, father: "Jan Sierens", mother: "Maria van Waes"
}, { name: "Laurentia Haverbeke", sex: "f", born: 1710, died: 1786, father: "Jan Haverbeke", mother: "Maria de Rycke"
}, { name: "Carel Haverbeke", sex: "m", born: 1796, died: 1837, father: "Pieter Antone Haverbeke", mother: "Livina Sierens"
}, { name: "Elisabeth Hercke", sex: "f", born: 1632, died: 1674, father: "Willem Hercke", mother: "Margriet de Brabander"
}, { name: "Jan Haverbeke", sex: "m", born: 1671, died: 1731, father: "Lieven Haverbeke", mother: "Elisabeth Hercke"
}, { name: "Anna van Hecke", sex: "f", born: 1607, died: 1670, father: "Paschasius van Hecke", mother: "Martijntken Beelaert"
}, { name: "Maria Sturm", sex: "f", born: 1835, died: 1917, father: "Charles Sturm", mother: "Seraphina Spelier"
}, { name: "Jacobus Bernardus van Brussel", sex: "m", born: 1736, died: 1809, father: "Jan van Brussel", mother: "Elisabeth Haverbeke"
}];
function average(array) { return array.reduce((a, b) => a + b) / array.length;
}
var byName = {};
ancestry.forEach(person => byName[person.name] = person);
/* instructor solution, he works directly with the ancestry array */
var differences = ancestry
.filter(person => byName[person.mother] != null)
.map(person => person.born - byName[person.mother].born);
console.log(average(differences));
/* my solution, I work with the byName object */
var getAgeDifferences = (data) => { differences = []; for (var person in data) { var mother = data[person].mother; if (mother in data) { differences.push(data[person].born - data[mother].born); } } return differences;
};
var ageDifferences = getAgeDifferences(byName);
console.log(average(ageDifferences));
EjS Ch. 5, Ex. 2 - Script Codes
EjS Ch. 5, Ex. 2 - Script Codes
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Developer Brendan Moran
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Uploaded November 28, 2022
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