How to access an object inside an Array Javascript -

i have bunch of objects in array.

• how can access objects?
• and how add key every object?

example

var gradesarr = [     {         'name' : 'Пешо',         'score' : 91     },     {         'name' : 'Лилия',         'score' : 290     },     {         'name' : 'Алекс',         'score' : 343,     },     {         'name' : 'Габриела',         'score' : 400     },     {         'name' : 'Жичка',         'score' : 70     }] 

i want add key haspassed objects, have score on 100.

but can't mind of way this.

you can loop through array , add property objects. e.g:

for (var = 0; < gradesarr.length; i++) {   if (gradesarr[i].score > 100) {     gradesarr[i].haspassed = true;   } } 

var gradesarr = [{    'name': 'Пешо',    'score': 91  }, {    'name': 'Лилия',    'score': 290  }, {    'name': 'Алекс',    'score': 343,  }, {    'name': 'Габриела',    'score': 400  }, {    'name': 'Жичка',    'score': 70  }];      (var = 0; < gradesarr.length; i++) {    if (gradesarr[i].score > 100) {      gradesarr[i].haspassed = true;    }  }    document.queryselector('pre').innerhtml = json.stringify(gradesarr, null, 2);

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