按属性值对对象的javascript数组进行排序并按条件重新排序

Question

I have an array of objects Like :

 var newArray = [ {value : "P1"}, {value : "P2/S2"}, {value : "P2"}, {value : "P1"}, {value : "P1/S2"}, {value : "P1/S3"}, {value : "P2/S1"}, {value : "P1/S3"}, {value : "P2/S2"}, {value : "P1"}, {value : "P2"}, {value : "P3"} ]; function compare( a, b ) { if ( a.value < b.value ){ return -1; } if ( a.value > b.value ){ return 1; } return 0; } newArray.sort( compare ); console.log(newArray);

[{"value":"P1"},{"value":"P1"},{"value":"P1"},{"value":"P1/S2"},{"value":"P1/S3"},{"value":"P1/S3"},{"value":"P2"},{"value":"P2"},{"value":"P2/S1"},{"value":"P2/S2"},{"value":"P2/S2"},{"value":"P3"}]

But here i have a rearrangement in sorting if there is no S value after P value. P value should be low priority if there is no S value. I am expecting a result like this :

[{"value":"P1/S2"},{"value":"P1/S3"},{"value":"P1/S3"},{"value":"P1"},{"value":"P1"},{"value":"P1"},{"value":"P2/S1"},{"value":"P2/S2"},{"value":"P2/S2"},{"value":"P2"},{"value":"P2"},{"value":"P3"}]

Answer 1

You could add a suffix and sort smaller strings to the bottom.

 function compare({ value: a }, { value: b }) { a += 'ZZZ'; b += 'ZZZ'; return a > b || -(a < b); } var array = [{ value: "P1" }, { value: "P2/S2" }, { value: "P2" }, { value: "P1" }, { value: "P1/S2" }, { value: "P1/S3" }, { value: "P2/S1" }, { value: "P1/S3" }, { value: "P2/S2" }, { value: "P1" }, { value: "P2" }, { value: "P3" }]; array.sort(compare); console.log(array);

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Answer 2

Maybe computing values weight? For example:

function computeWeight(str) {
  var weight = 0;
  for (var i = str.length-1; i >= 0; i--) {
    weight = weight + (str.charCodeAt(i) * Math.pow(10, i));
  }
  return weight;
}

this way longer strings will have a greater weight than the smaller ones because they have more symbols. Then you can use that function in your compare .