Regex match group based on array with key value

Question

Here is what I'm currently doing to match values in the vars array with object keys inside of newaction.

Object.keys(newaction).forEach((e) => {
        try {
            var newVal = newaction[e].replace(regex, (_match, group1) => vars[group1]);
            newaction[e] = newVal;
        } catch (err) {
            console.log(err);
        }
    });

So each matching property of newaction will be replaced by the value in vars which has a matching key.

What I'm trying to do now is replace the value in newaction with the matching value in vars, but where the value in vars is an array.

So say vars looks like this:

[{
    "name": "test",
    "value": ["HP": '35',
    "Atk": '55',
    "Def": '30',
    "SpA": '50',
    "SpD": '40',
    "Spe": '90',]
}]

If I now want to match it in the form of newvalue[e] being test[HP] to get the value '35', the original regex does not work.

You can't have key:value pairs in an array, only in an object. — Barmar
– Barmar, Commented Apr 27, 2020 at 18:13

Barmar · Accepted Answer · 2020-04-27 18:23:58Z

1

Change vars to an object whose key is the name and value is the object with the key:value pairs. Then you can use the two groups as indexes into the main object and nested object.

vars = {
  "test": {
    "HP": '35',
    "Atk": '55',
    "Def": '30',
    "SpA": '50',
    "SpD": '40',
    "Spe": '90'
  }
};

const regex = /(\w+)\[(\w+)\]/;
Object.keys(newaction).forEach((e) => {
  try {
    var newVal = newaction[e].replace(regex, (_match, group1, group2) => vars[group1][group2]);
    newaction[e] = newVal;
  } catch (err) {
    console.log(err);
  }
});

answered Apr 27, 2020 at 18:23

Barmar

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2 Comments

Austin Over a year ago

Thanks. This does seem to work, but it no longer is matching how it was previously in cases where there is only one group

Barmar Over a year ago

Right, this only works for the new problem. You can use the old code for the original replacements.

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