29 lines
656 B
Markdown
29 lines
656 B
Markdown
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# .cadoles-slide-title[Tableaux (1/2)]
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**Différentes notations**
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```js
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var arr = [1, 2, 3]; // A préférer
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arr = new Array(1, 2, 3);
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// Attention !
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arr = new Array(3); // -> [undefined, undefined, undefined]
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```
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**Manipulation d'un tableau**
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```js
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var arr = [1, 2, 3];
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// Propriétés
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arr.length // -> 3
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arr[0] // -> 1
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// Méthodes (liste non exhaustive)
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arr.push(4); // -> [1, 2, 3, 4]
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arr.pop(); // -> [1, 2, 3]
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arr.unshift(0); // -> [0, 1, 2, 3]
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arr.shift(); // -> [1, 2, 3]
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arr.indexOf(2) // -> 1
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arr = [2, 3, 1];
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arr.sort(); // -> [1, 2, 3]
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arr.join(', '); // -> '1, 2, 3'
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```
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