46 lines
797 B
Markdown
46 lines
797 B
Markdown
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# .cadoles-slide-title[Tableaux (2/2)]
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**Méthodes de parcours et transformations**
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```js
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var arr = [1, 2, 3];
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// Traverser le tableau
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arr.forEach(function(item, index) {
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console.log('Item:', item, 'Index:', index);
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});
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// Transformer un tableau
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var square = arr.map(function(item, index) {
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return item*item;
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}); // -> [1, 4, 9]
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// Réduire un tableau
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var sum = arr.reduce(function(memo, item, index) {
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return memo+item;
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}, 0); // -> 6
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```
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**Exercice**
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```js
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var arr = [15, 20, 15, 16, -1, 4];
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var max = arr.??(function(??) {
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??
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}, ??);
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console.log(max); // -> 20
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```
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???
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Solution Exo
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```js
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var arr = [15, 20, 15, 16, -1, 4];
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var max = arr.reduce(function(memo, item, index) {
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if(!memo) {
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memo = item;
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} else if(item >= memo) {
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memo = item;
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}
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return memo;
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});
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```
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