/**
* Les arrays
*/
// auteurs [["nom ", "prénom", "pays"]]
var writers = [
["Karl", "Marx", "de"],
["Jean-Jacques", "Rousseau", "fr"],
["Victor", "Hugo", "fr"],
["René", "Descartes", "fr"],
["Paul", "Verlaine", "fr"],
["Antonio", "Gramsci", "it"],
["Georg", "Lukacs", "hu"],
["Franz", "Kafka", "hu"],
["Arthur", "Rimbaud", "fr"],
["Gérard", "de Nerval", "fr"],
["Chrétien", "de Troyes", "fr"],
["François", "Rabelais", "fr"],
["Georg", "Hegel", "de"],
["Friedrich", "Engels", "de"],
]
console.table(writers);
// accés aux élèments du tableau
console.log(writers[0]);
console.log(`${writers[0][0]}, ${writers[0][1]} (${writers[0][2]})`);
console.assert("Karl, Marx (de)" === `${writers[0][0]}, ${writers[0][1]} (${writers[0][2]})`);
//sauvegarder la valeur du prénom de Marx
var karl = writers[0][0]
//éditer un élement du tableau, le prénom de Marx
writers[0][0] = "Karlito"
console.log(`${writers[0][0]}, ${writers[0][1]} (${writers[0][2]})`);
console.assert("Karlito, Marx (de)" === `${writers[0][0]}, ${writers[0][1]} (${writers[0][2]})`);
console.assert("Karl" === karl);
//remettre la valeur initale du prénom de Marx
writers[0][0] = karl;
console.assert(`${karl}, Marx (de)` === `${writers[0][0]}, ${writers[0][1]} (${writers[0][2]})`);
console.log("---------");
/**
* Arrays: map/forEach/pop/push/slice/sort/shift/unshift
*/
var numbers = [1, 5, 4, 3, 2];
console.log("Iterate with forEach");
// parcourir avec array.forEach
numbers.forEach((it) => console.log(it));
console.log("---------");
console.log("Iterate with map");
// parcourir avec array.map
numbers.map((it) => console.log(it));
console.log("---------");
//afficher les éléments sur une ligne
//génère la string avec le formatage des nombres
const numbersString = (numberArray) => {
var consoleOutput = new String();
numberArray.forEach(number => consoleOutput += `${number}, `);
return consoleOutput = consoleOutput.substring(0, consoleOutput.length - 2);
};
//affiche la chaine entre crochets dans la console
const displayNumbers = (numbersStr) => {
console.log(`[${numbersString(numbersStr)}]`);
};
console.log("orginal number array")
displayNumbers(numbers);
console.log("---------");
//push: ajoute à la fin
console.log("push");
numbers.push(6);
displayNumbers(numbers);
console.log("---------");
//pop: suprime le dernier
console.log("pop");
numbers.pop();
displayNumbers(numbers);
console.log("---------");
//unshift: ajouter le parametre au debut de l'array
console.log("unshift");
numbers.unshift(0);
displayNumbers(numbers);
console.log("---------");
//shift: supprime le premier element de l'array
console.log("shift");
numbers.shift();
displayNumbers(numbers);
console.log("---------");
//slice: renvoi l'array entre les positions en argument
console.log("slice");
var sliceNumbersResult = numbers.slice(2, 4);
displayNumbers(sliceNumbersResult);
console.log("---------");
//sort asc
console.log("sort asc");
var ascSort = numbers.sort((a, b) => a - b);
displayNumbers(ascSort);
console.log("---------");
//sort desc
console.log("sort desc");
var descSort = numbers.sort((a, b) => b - a);
displayNumbers(descSort);
console.log("---------");
