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@rodpoblete
Last active May 19, 2017 16:33
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Profile Lookup Problem
// We have an array of objects representing different people in our contacts lists.
// A lookUpProfile function that takes firstName and a property (prop) as arguments has been pre-written for you.
// The function should check if firstName is an actual contact's firstName and the given property (prop) is a property of that contact.
// If both are true, then return the "value" of that property.
// If firstName does not correspond to any contacts then return "No such contact"
// If prop does not correspond to any valid properties then return "No such property"
/*
//Setup
var contacts = [
{
"firstName": "Akira",
"lastName": "Laine",
"number": "0543236543",
"likes": ["Pizza", "Coding", "Brownie Points"]
},
{
"firstName": "Harry",
"lastName": "Potter",
"number": "0994372684",
"likes": ["Hogwarts", "Magic", "Hagrid"]
},
{
"firstName": "Sherlock",
"lastName": "Holmes",
"number": "0487345643",
"likes": ["Intriguing Cases", "Violin"]
},
{
"firstName": "Kristian",
"lastName": "Vos",
"number": "unknown",
"likes": ["Javascript", "Gaming", "Foxes"]
}
];
*/
function lookUpProfile(firstName, prop){
for (var i = 0; i < contacts.length; i++) {
if (contacts[i].firstName === firstName) {
if (contacts[i].hasOwnProperty(prop)) {
return contacts[i][prop];
} else {
return "No such property";
}
}
}
return "No such contact";
}
/* Explicación del código:
- El bucle for se ejecuta, comenzando en el primer objeto de la lista de contactos.
- Si el parámetro firstName pasó a la función y coincide con el valor de la clave "firstName" en el primer objeto, se pasa la instrucción if.
- Luego, usamos el método .hasOwnProperty () (comprueba si hay una propiedad dada y devuelve un booleano) con prop como argumento. Si es cierto, se devuelve el valor de prop.
- Si la segunda instrucción if falla, no se devuelve tal propiedad.
- Si la primera instrucción if falla, el bucle for continúa con el siguiente objeto de la lista de contactos.
- Si el parámetro firstName no coincide con el objeto de contactos final, el bucle for se cierra y no se devuelve tal contacto.
*/
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