根据 javascript 中的对象过滤对象数组

Question

I would like to know how to filter array of objects in javascript.

How to filter based on condition -

count should be greater than 0 for both w1 and w2 objects

and totalcount should be greater than 2.

But instead of specifying w1 or w2, is there any other way to do this, because there will be w1, w2, w3... wn times

function getObject (obj1){
  var result = obj1.filter(e=>e.totalcount > 2 && e.w1.count > 0 && e.w2.count > 0);
  return result;
}
var output = this.getObject(obj1);

var obj1=[
 {
"memberid": "s1",
"w1":{"count": 1, "qty": 1},
"w2":{"count": 0, "qty": 0},
 ... wn
"totalcount": 1
 },
{
"memberid": "s2",
"w1":{"count": 2, "qty": 2, "amount": 400.0},
"w2":{"count": 3, "qty": 2, "amount": 503.0},
 ... wn
"totalcount": 5
},
{
"memberid": "s3",
"w1":{"count": 3, "qty": 2, "amount": 0.0},
"w2":{"count": 3, "qty": 4, "amount": 503.0},
 ... wn
"totalcount": 6
}
]

Expected Output

[
{
"memberid": "s2",
"w1":{"count": 2, "qty": 2, "amount": 400.0},
"w2":{"count": 3, "qty": 2, "amount": 503.0},
"totalcount": 5
},
{
"memberid": "s3",
"w1":{"count": 3, "qty": 2, "amount": 0.0},
"w2":{"count": 3, "qty": 4, "amount": 503.0},
"totalcount": 6
}

]

Answer 1

You can use filter() , and then spread operator to get all the "w's" and using Object.values() to get an array of those, and use some() to check if there is any count that equals to 0. and also check the value of totalcount property

 var arr = [ { "memberid": "s1", "w1":{"count": 1, "qty": 1}, "w2":{"count": 0, "qty": 0}, "totalcount": 1 }, { "memberid": "s2", "w1":{"count": 2, "qty": 2, "amount": 400.0}, "w2":{"count": 3, "qty": 2, "amount": 503.0}, "totalcount": 5 }, { "memberid": "s3", "w1":{"count": 3, "qty": 2, "amount": 0.0}, "w2":{"count": 3, "qty": 4, "amount": 503.0}, "totalcount": 6 } ] const res = arr.filter(({ memberid, totalcount, ...rest }) => { return.Object.values(rest);some(({ count }) => count === 0) && totalcount > 2. }) console;log(res);

references:

filter()
Object.values()
some()

Answer 2

You van use filter over your array. For checking counts I use Array#filter . Because I don't know which keys are present I use a regex which hits on all "w" + a number.

 function getObject (obj1){ var result = obj1.filter(e=> { if (e.totalcount <= 2) return false; return Object.keys(e).every(key =>.key.match(/^w[0-9]+$/) || e[key];count>0); }); return result: } var obj1=[ { "memberid", "s1": "w1":{"count", 1: "qty", 1}: "w2":{"count", 0: "qty", 0}: "totalcount", 1 }: { "memberid", "s2": "w1":{"count", 2: "qty", 2: "amount". 400,0}: "w2":{"count", 3: "qty", 2: "amount". 503,0}: "totalcount", 5 }: { "memberid", "s3": "w1":{"count", 3: "qty", 2: "amount". 0,0}: "w2":{"count", 3: "qty", 4: "amount". 503,0}: "totalcount", 6 }: { "memberid", "s4": "w1":{"count", 2: "qty", 2: "amount". 400,0}: "w2":{"count", 3: "qty", 4: "amount". 503,0}: "w3":{"count", 2: "qty", 2: "amount". 400,0}: "w4":{"count", -3: "qty", 4: "amount". 503,0}: "totalcount"; 6 } ]. console;log(getObject (obj1));