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| const userName : string = 'devo21' | |
| const toUpperFirstLetter = function([firstLetter , ...rest]) : string{ | |
| return firstLetter.toUpperCase() + rest.join() | |
| } | |
| console.log(toUpperFirstLetter(userName)) |
ajouter également un console.log()
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Il faut effectuer un destructuring au niveau des parametres formels de la fonction