Jsonobject How To Change Value Depend On Key Value?

I've a json like this : [ { 'pages': 'foo1', 'hasil': '' }, { 'pages': 'foo2', 'hasil': '' }, { 'pages': 'foo3',

Solution 1:

As fas as I understand your problem statment, are you looking for something like this?

var data = [
    {
        "pages": "foo1",
        "hasil": ""
    },
    {
        "pages": "foo2",
        "hasil": ""
    },
    {
        "pages": "foo3",
        "hasil": ""
    },
    {
        "pages": "foo4",
        "hasil": ""
    },
    {
        "pages": "foo5",
        "hasil": ""
    },
    {
        "pages": "foo6",
        "hasil": ""
    }
];

for(let key inthis.data){
  if(this.data[key].pages == 'foo1'){
    this.data[key].hasil = 'hello';
  }
}
console.log(data);

Solution 2:

You could use find;

var array = [
    {
        "pages": "foo1",
        "hasil": ""
    },
    {
        "pages": "foo2",
        "hasil": ""
    },
    {
        "pages": "foo3",
        "hasil": ""
    },
    {
        "pages": "foo4",
        "hasil": ""
    },
    {
        "pages": "foo5",
        "hasil": ""
    },
    {
        "pages": "foo6",
        "hasil": ""
    }
];

var foundItem = array.find(function(element) {
  return element.pages == "foo5";
});
foundItem.hasil = "123";
console.log(array);

Solution 3:

Iterate over the json objects and apply hasil according to your requirements:

var data = [
    {
        "pages": "foo1",
        "hasil": ""
    },
    {
        "pages": "foo2",
        "hasil": ""
    },
    {
        "pages": "foo3",
        "hasil": ""
    },
    {
        "pages": "foo4",
        "hasil": ""
    },
    {
        "pages": "foo5",
        "hasil": ""
    },
    {
        "pages": "foo6",
        "hasil": ""
    }
];

for(let obj of data){
  let pages = obj['pages'];
  if (pages.includes('foo')) {
    obj['hasil'] = "h" + pages;
  }
}

console.log(data);