获取javascript对象中key = option的元素数 [英] Get count of elements in javascript object where key=option

问题描述

这是一个javascript对象.
如何获得条件为 gallery ="Abstract" 和 gallery ="Game" 的元素计数.

This is a javascript object.
How can I get the count of elements with condition gallery="Abstract" and gallery="Game".

window.paintings = { 
  1: { id: 1, name: 'Abstract 1', gallery: 'Abstract', src:'Image64.jpg' }, 
  2: { id: 2, name: 'Abstract 2', gallery: 'Abstract', src:'Image65.jpg' }, 
  3: { id: 3, name: 'Abstract 3', gallery: 'Abstract', src:'Image66.jpg' }, 
  4: { id: 1, name: 'Game 1', gallery: 'Game', src:'Image66.jpg' }, 
  5: { id: 2, name: 'Game 2', gallery: 'Game', src:'Image66.jpg' }, 
};

推荐答案

如果要遍历该对象:

p = { 
  1: { id: 1, name: 'Abstract 1', gallery: 'Abstract', src:'Image64.jpg' }, 
  2: { id: 2, name: 'Abstract 2', gallery: 'Abstract', src:'Image65.jpg' }, 
  3: { id: 3, name: 'Abstract 3', gallery: 'Abstract', src:'Image66.jpg' }, 
  4: { id: 1, name: 'Game 1', gallery: 'Gme', src:'Image66.jpg' }, 
  5: { id: 2, name: 'Game 2', gallery: 'Game', src:'Image66.jpg' }, 
};
var count = 0;
for (var key in p) {
  if (p.hasOwnProperty(key)) {
    if(p[key].gallery === "Abstract" || p[key].gallery === "Game")
      count++;
  }
}

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