I have a dictionary that has the format of
dictionary = {0: {object}, 1:{object}, 2:{object}}
How can I iterate through this dictionary by doing something like
for((key,value) in dictionary){
//Do stuff where key would be 0 and value would be the object
}
This question is related to
javascript
dictionary
object
iterator
ecmascript-7
You can use JavaScript forEach
Loop:
myMap.forEach((value, key) => {
console.log('value: ', value);
console.log('key: ', key);
});
You can use below script.
var obj={1:"a",2:"b",c:"3"};
for (var x=Object.keys(obj),i=0;i<x.length,key=x[i],value=obj[key];i++){
console.log(key,value);
}
outputs
1 a
2 b
c 3
As an improvement to the accepted answer, in order to reduce nesting, you could do this instead, provided that the key is not inherited:
for (var key in dictionary) {
if (!dictionary.hasOwnProperty(key)) {
continue;
}
console.log(key, dictionary[key]);
}
Edit: info about Object.hasOwnProperty
here
You can do something like this :
dictionary = {'ab': {object}, 'cd':{object}, 'ef':{object}}
var keys = Object.keys(dictionary);
for(var i = 0; i < keys.length;i++){
//keys[i] for key
//dictionary[keys[i]] for the value
}
Try this:
dict = {0:{1:'a'}, 1:{2:'b'}, 2:{3:'c'}}
for (var key in dict){
console.log( key, dict[key] );
}
0 Object { 1="a"}
1 Object { 2="b"}
2 Object { 3="c"}
WELCOME TO 2020 *Drools in ES6*
Theres some pretty old answers in here - take advantage of destructuring. In my opinion this is without a doubt the nicest (very readable) way to iterate an object.
const myObject = {
nick: 'cage',
phil: 'murray',
};
Object.entries(myObject).forEach(([k,v]) => {
console.log("The key: ",k)
console.log("The value: ",v)
})
_x000D_
Edit:
As mentioned by Lazerbeak, map
allows you to cycle an object and use the key and value to make an array.
const myObject = {
nick: 'cage',
phil: 'murray',
};
const myArray = Object.entries(myObject).map(([k, v]) => {
return `The key '${k}' has a value of '${v}'`;
});
console.log(myArray);
_x000D_
Try this:
var value;
for (var key in dictionary) {
value = dictionary[key];
// your code here...
}
The Object.entries()
method has been specified in ES2017 (and is supported in all modern browsers):
for (const [ key, value ] of Object.entries(dictionary)) {
// do something with `key` and `value`
}
Explanation:
Object.entries()
takes an object like { a: 1, b: 2, c: 3 }
and turns it into an array of key-value pairs: [ [ 'a', 1 ], [ 'b', 2 ], [ 'c', 3 ] ]
.
With for ... of
we can loop over the entries of the so created array.
Since we are guaranteed that each of the so iterated array items is itself a two-entry array, we can use destructuring to directly assign variables key
and value
to its first and second item.
I think the fast and easy way is
Object.entries(event).forEach(k => {
console.log("properties ... ", k[0], k[1]); });
just check the documentation https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries
using swagger-ui.js
you can do this -
_.forEach({ 'a': 1, 'b': 2 }, function(n, key) {
console.log(n, key);
});
Source: Stackoverflow.com