How to create dynamic dictionary and add-remove key–value pairs?

Question

I refer below post but did not get it properly See here

I was tried to do this same thing as that post. The only issue is that I don’t know what the keys and the values are upfront. So I need to be able to dynamically add and remove the key and value pairs and I don’t know how to achieve that.

Is anyone know how to create that object and add key value pairs dynamically and perform crud operation on it?

I’ve tried:

var dict = [{key:"key", value:"value"}];
dict[0].key = "keys";
dict[0].value = "vals";
console.log(dict);
// return null value of dict object.

So that doesn’t work. Thank you

You can simply try:- dict["key"] = value, you can get all the keys and values using Object.keys(dict) and Object.values(dict). — Gourishankar, Apr 09 '19 at 05:42
You could use a `Map`, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map#Examples — sschmeck, Apr 09 '19 at 05:58
To get all keys of your datastructure try `dirct.map(({key}) => key)` in JS6. — sschmeck, Apr 09 '19 at 06:00
yes now i'm able to added new keys with value but how can i delete dynamically ? — Hardik Virani, Apr 09 '19 at 06:06
You can iterate over the array of keys using Object.keys(dict) which will return array of keys and delete the key value pair you want to using map as iterator. — akhil choudhary, Apr 09 '19 at 06:11

score 0 · Answer 1 · answered Apr 09 '19 at 06:11

You can use Map.
Map object has functions to set keys and values dynamically using .set(key, value)

var dict = new Map();
dict.set("key1", "value1");
dict.set("key2", "value2");
dict.set("key3", "value3");

for (var [key, value] of dict) {
  console.log(key + ' = ' + value);
}

score 0 · Accepted Answer · answered Apr 11 '19 at 05:41

0

I've tried dynamically using .set(key, value) and it's work

var dict = new Map();
dict.set("key1", "value1");

for (var [key, value] of dict) {
  console.log(key + ' = ' + value);
}

answered Apr 11 '19 at 05:41

How to create dynamic dictionary and add-remove key–value pairs?

2 Answers2