javascript - 用另一个对象的索引填充一个对象

Question

我有两个对象。一个是单词数组，另一个给出第一个数组中两个单词之间的关系:

nodes = ["apple","cherry","pear","strawberry"]

data = [{word1 : "apple", word2 : "cherry" , weight : "0.1"},
        {word1 : "apple", word2 : "strawberry" , weight : "0.2"},
        {word1 : "cherry", word2 : "pear" , weight : "0.3"},
        {word1 : "cherry", word2 : "strawberry" , weight : "0.4"},
        {word1 : "strawberry", word2 : "pear" , weight : "0.5"}]

我想创建一个具有数据结构的新对象，而不是单词，而是它们的索引。就像这样:

links =  [{source : "0", target : "1" , value : "0.1"},
          {source : "0", target : "3" , value : "0.2"},
          {source : "1", target : "2" , value : "0.3"},
          {source : "1", target : "3" , value : "0.4"},
          {source : "3", target : "2" , value : "0.5"}]

到目前为止我有这个:

for (var i = 0 ; i < nodes.length; i++) {
     test[i] = nodes.findIndex(d => d == nodes[i]);
}

这给了我这个新数组，对应于节点中的索引:

test = [0,1,2,3]

那么我现在该如何将这些索引分配给links中的属性？

Answer 1

尝试:

var nodes = ["apple","cherry","pear","strawberry"];

var data = [{word1 : "apple", word2 : "cherry" , weight : "0.1"},
        {word1 : "apple", word2 : "strawberry" , weight : "0.2"},
        {word1 : "cherry", word2 : "pear" , weight : "0.3"},
        {word1 : "cherry", word2 : "strawberry" , weight : "0.4"},
        {word1 : "strawberry", word2 : "pear" , weight : "0.5"}];

var links = data.map((item) => {
    return {
        source: nodes.indexOf(item.word1),
        target: nodes.indexOf(item.word2),
        value: item.weight
        
    };
});

console.log(links);
console.log(data);