javascript - 如果值为 0，则从数组中的对象中删除属性

Question

如果对象的值为零，我如何从对象中删除该属性？

var row = [{
  2013: "0", 
  2014: "0",       
  2015: "95163",
  carseries: "Sindelfingen"
},{
  2013: "0", 
  2014: "38954", 
  2015: "0", 
  2016: "0", 
  carseries: "Bremen"
}];

输出应该是这样的:

var row = [{
  2015: "95163",
  carseries: "Sindelfingen"
},{
  2014: "38954",  
  carseries: "Bremen"
}];

Answer 1

您需要使用数组迭代器的组合:map , filter , 和 reduce .

function clean(obj) {
  return Object.keys(obj) // get own keys
               .filter(function(key) {  // keep non '0' values
                 return obj[key] !== '0'
               })
              .reduce(function(out, key) { // recreate object using filtered keys
                 out[key] = obj[key]

                 return out
              }, {})
}

var row = [{
  2013: "0",
  2014: "0",
  2015: "95163",
  carseries: "Sindelfingen"
}, {
  2013: "0",
  2014: "38954",
  2015: "0",
  2016: "0",
  carseries: "Bremen"
}];

// apply clean function to each element of initial array
console.log(row.map(clean))