Remove first and last two record from json

user_6569010 0
Viewed 715
data:[
  { user: "2016-04-14", avg_: "13", new: "32511.20" },
  { user: "2016-04-21", avg_: "32", new: "32779.17" },
  { user: "2016-04-22", avg_: "32", new: "32898.40" },
  { user: "2016-04-23", avg_: "32", new: "32903.11" },
  { user: "2016-04-24", avg_: "32", new: "329" },
  { user: "2016-04-25", avg_: "3298", new: "32962.78" }
];

I tried and it successfully removed last two elements

for (var i = 1; i <= 2; i++) {
    var s = data.splice(-1, i);
    console.log(s);
}

Now, I don't want to repeat this logic to remove first two any idea ?

object arrays jquery json javascript
2 Answers

You can simply get the first two and also last elements without the loop by only using slice

const data = [
        {user: "2016-04-14", avg_: "13", new: "32511.20"},
        {user: "2016-04-21", avg_: "32", new: "32779.17"},
        {user: "2016-04-22", avg_: "32", new: "32898.40"},
        {user: "2016-04-23", avg_: "32", new: "32903.11"},
        {user: "2016-04-24", avg_: "32", new: "329"},
        {user: "2016-04-25", avg_: "3298", new: "32962.78"}
      ];
    
    const res = [...data.slice(0, 2), ...data.slice(-2)]
console.log(res);

or if you want to remove the first and last two and keep the rest, you can write it like

const data = [
        {user: "2016-04-14", avg_: "13", new: "32511.20"},
        {user: "2016-04-21", avg_: "32", new: "32779.17"},
        {user: "2016-04-22", avg_: "32", new: "32898.40"},
        {user: "2016-04-23", avg_: "32", new: "32903.11"},
        {user: "2016-04-24", avg_: "32", new: "329"},
        {user: "2016-04-25", avg_: "3298", new: "32962.78"}
      ];
    
    const res = data.slice(2, -2)
console.log(res);

user_59281860

Very simple way - just call these functions:

arr.pop():
arr.pop();
arr.shift();
arr.shift();

And the two first and two last elements will be removed.

user_102217650
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