Created
December 8, 2015 22:56
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// Map | |
/* El método map() crea un nuevo arreglo ejecutando una | |
función para cada uno de los elementos de un arreglo */ | |
function doble(e) { | |
return e * 2; | |
} | |
var arreglo = [1, 2, 3, 4, 5]; | |
var resultado = arreglo.map(doble); | |
var resultado2 = arreglo.map(function (e) { | |
return e * 2; | |
}); | |
// var resultado3 = arreglo.map(e => e * 2); | |
console.log(resultado); // [2, 4, 6, 8, 10]; | |
var palabras = ["uno", "dos", "tres"]; | |
var mayusculas = palabras.map(function (p) { | |
return p.toUpperCase(); | |
}); | |
// var mayusculas2 = palabras.map(p => p.toUpperCase()); | |
console.log(mayusculas); // ["UNO", "DOS", "TRES"] | |
var nombres = ["John", "Jane", "Matt"]; | |
var edades = [23, 45, 31]; | |
var personas = nombres.map(function (n, i) { | |
return { nombre: n, edad: edades[i] }; | |
}); | |
// var personas2 = nombres.map((n, i) => { return { nombre: n, edad: edades[i] } }); | |
console.log(personas); |
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