Eu estava estudando e apareceu este código:
var materials = [ 'Hydrogen', 'Helium', 'Lithium', 'Beryllium' ]; console.log(materials.map(material => material.length));
Pelo o que eu entendi, ele varre o array e retorna outro array com o numero de letras de cada palavra, mas como isso acontece? Se o
map a função de retornar as ”palavras” do array e o
lenght também ?
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