JavaScriptCourse/arreglos.html at master · clmtest/JavaScriptCourse · GitHub

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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>

        const a = []
        const b = [1,true,"hola",["A","B","C",[1,2,3,4]]]
        console.log(a)
        console.log(b)
        console.log(b.length)
        console.log(b[2])
        console.log(b[3])
        console.log(b[3][2])
        console.log(b[3][3][3])

        const c = Array.of("x","y","z",9,8,7) // Crear Array
        console.log (c)

        const d = Array(100).fill(false);
        console.log(d)

        // Forma antigua ------------------------------------

        const e = new Array ()
        console.log(e)

        const f = new Array (1,2,3,4,5,6,7,8,9,"Christian")
        console.log(f)

        // --------------------------------------------------

        // METODOS ARRAY

        const colores = ["ROJO","VERDE","AZUL"];
        console.log(colores);

        colores.push("NEGRO"); // Agrega
        console.log(colores);

        colores.pop() // quita el ultimo
        console.log(colores)

        // METODO FOREACH

        colores.forEach(function(el,index) {
            console.log (`<li id="${index}">${el}</li>`);
        })

        /* RECIVE UNA FUNCION QUE SE VA EJECUTAR POR
         CADA ELEMENTO QUE TENGA, siendo el valor
         el (elemento), y el valor index (posicion)
        */
    </script>
</body>
</html>