我如何将 Map() 原样转换为字符串，而不将其变成 js/ts 中的 json 对象

Question

Basically i want to turn a Map into a string as text. I have tried toString() and template literals but those return [object Map] obviously. I also saw that some people converted the Map into an object then called JSON.stringify() on it.

However i don't want my Map be displayed as a JSON Object, but as an actual Map

Suppose i had a Map of

{ 'key' => 'value' }

i want it to be displayed like the above and not like the one below

{
  "key": "value"
}

Is there any way i could achieve this?

UPDATE: After some experimenting i finally found a alright-enough method

const convertMapToString = (m: Map<string, IGuildCache | object>) => {

    let mapEntries = [...m.keys()]

    return '{\n' + mapEntries.map(k => {
        return '    ' + k + ' => ' + JSON.stringify(m.get(k), null, 2)
    }).join(',\n') + '\n}'
}

The values of the map were objects so i did not mind converting them into JSON.

Answer 1

You'l have to create your own functions, maybe something like :

function displayMapsWithCustomFormat(m: Map) {

  let asStrings = m.map((key, value) => `"${key}" => "${value}"`);
  console.log("{\n" + asStrings.join(",\n") + "}");
}

Not tested, but you can give it a try. You can complexify a bit if you espext other types. Like if you have nested map, make this function recursive.

Answer 2

if you need to display object like { 'key' => 'value' } and not ":" exists on key or value you can do

let data = {'key' : 'value'}
JSON.stringify(data).replace(":", " => ")