Get JSON object dynamically

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Get JSON object dynamically

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#1 by (1 votes)
#2 by (1 votes)
#3 by (-1 votes)

1

I have jSON that I created and wanted to dynamically grab the array and objects inside it

var json = [
    {'PHP': 
        [
            {'aula1':
                [
                'txt','O PHP é uma linguagem ...',
                'img','caminho','descrição'
                ]
            },
            {'aula2':
                [
                'txt','Nessa aula aprenderemos ...',
                'btn','Download','caminho','nome'
                ]
            }
        ]
    },
    {'HTML':
        [
            {'aula1':
                [
                'txt','HTML significa linguagem ...'
                ]
            },
            {'aula2':
                [
                'txt','Nessa aula aprenderemos ...',
                'btn','Download','caminho','nome'
                ]
            }
        ]
    }
]

something like:

var materia = 'PHP'
var numMateria = 0
var aula = 'aula1'
var numAula = 0

for(i = 0; i < json.[indexMateria].materia[indexAula].aula.length; i++) {
    if(json.[indexMateria].materia[indexAula].aula[i] == 'txt') {
        document.write('<p>' + json.[indexMateria].materia[indexAula].aula[i+1] + '</p>')
        i += 1
    } else if(json.[indexMateria].materia[indexAula].aula[i] == 'img') {
        document.write('<img src="' + json.[indexMateria].materia[indexAula].aula[i+1] + '" alt="' + json.[indexMateria].materia[indexAula].aula[i+2] + '">')
        i += 2
    }
}

But when I use json[indexMateria].materia it looks for a materia object instead of using the materia

Does anyone have any idea what to do? No problem changing json or using frameworks

javascript json

asked by anonymous 25.10.2017 / 14:03

3 answers

1

I'm not sure I understand your question very well, but when doing this:

json[indexMateria].materia

You're exactly looking for a 'materia' object in your JSON.

If I understood your purpose well, you should do something like this:

json[indexMateria][materia]

If possible detail a little more what you want to do.

25.10.2017 / 14:14

-1

Convert your json variable to Object and do the necessary processing with JavaScript.

var obj = JSON.parse(json);

25.10.2017 / 14:08

Compiling Ionic on MAC: Adding plugin says "Requirements check failed for JDK 1.8 or greater" but already installed I'm trying to register in C, but the code does not let me put the address

score 1 · Accepted Answer

As stated in the response from avsinacio, you can get the index of an object in javascrit by means of [] , it gets more or less like this

var json = [
    {'PHP': 
        [
            {'aula1':
                [
                'txt','O PHP é uma linguagem ...',
                'img','caminho','descrição'
                ]
            },
            {'aula2':
                [
                'txt','Nessa aula aprenderemos ...',
                'btn','Download','caminho','nome'
                ]
            }
        ]
    },
    {'HTML':
        [
            {'aula1':
                [
                'txt','HTML significa linguagem ...'
                ]
            },
            {'aula2':
                [
                'txt','Nessa aula aprenderemos ...',
                'btn','Download','caminho','nome'
                ]
            }
        ]
    }];
    
var indice1 = 0;
var materia = "PHP";
var indice2 = 0;
var aula = "aula1";

//Caso o objeto exista
if(typeof json[indice1][materia][indice2][aula] !== "undefined"){
      console.log(json[indice1][materia][indice2][aula]);
}