Question

186

Convert Map to JavaScript object

rated 0 times [ 193] [ 7] / answers: 1 / hits: 155664 / 8 Years ago, wed, may 25, 2016, 12:00:00

So Ive got the following javascript which contains a key/value pair to map a nested path to a directory.

function createPaths(aliases, propName, path) {

    aliases.set(propName, path);

}



map = new Map();



createPaths(map, 'paths.aliases.server.entry', 'src/test');

createPaths(map, 'paths.aliases.dist.entry', 'dist/test');

Now what I want to do is create a JSON object from the key in the map.

It has to be,

paths: {

  aliases: {

    server: {

      entry: 'src/test'

    },

    dist: {

      entry: 'dist/test'

    }

  }

}

Not sure if there is an out of a box way to do this. Any help is appreciated.

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keyonna

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answered 8 Years ago michelecarissab · Accepted Answer

You could loop over the map and over the keys and assign the value

function createPaths(aliases, propName, path) {

    aliases.set(propName, path);

}



var map = new Map(),

    object = {};



createPaths(map, 'paths.aliases.server.entry', 'src/test');

createPaths(map, 'paths.aliases.dist.entry', 'dist/test');



map.forEach((value, key) => {

    var keys = key.split('.'),

        last = keys.pop();

    keys.reduce((r, a) => r[a] = r[a] || {}, object)[last] = value;

});



console.log(object);