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filejs_arrays.js
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filejs_arrays.js
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// Exercice 1
function plusGrand(tableau, nombre) {
let output = [];
for (let i of tableau) {
if (i > nombre)
output.push(i);
}
return output;
}
for (let element of plusGrand([1, 2, 3, 4, 5, 6, 7, 8, 9], 3)) {
console.log(element); // Afficher en dehors de la fonction
}
// Exercice 2 et 3
// Exercice 2
function premiersNElements(tab = [], n = 1) {
let output = [];
if (n > tab.length) {
output = tab.slice();
} else {
for (let i = 0; i < n; i++) {
output.push(tab[i]);
}
}
return output;
}
// Exercice 3
function derniersNElements(tab = [], n = 1) {
let output = [];
if (n > tab.length) {
output = tab.slice();
} else {
for (let i = tab.length - n; i < tab.length; i++) {
output.push(tab[i]);
}
}
return output;
}
let tab = [15, 4, 22, 24, 17, 80];
let n = 3;
for (let element of premiersNElements(tab, n)) {
console.log(element);
}
for (let element of derniersNElements(tab, n)) {
console.log(element);
}
// Exercice 5
function combine(arr, n) {
let i, j, combo, head, tail;
if (n > arr.length || n <= 0) {
return [];
}
if (n == arr.length) {
return [arr];
}
if (n == 1) {
combo = [];
for (i = 0; i < arr.length; i++) {
combo.push([arr[i]]);
}
return combo;
}
combo = [];
for (i = 0; i < arr.length - n + 1; i++) {
head = arr.slice(i, i + 1);
tail = combine(arr.slice(i + 1), n - 1);
for (j = 0; j < tail.length; j++) {
combo.push(head.concat(tail[j]));
}
}
return combo;
}
let arr = ["blue", "white", "black", "rain"];
let num = 2;
console.log(combine(arr, num));