Does JSON.parse work for deep / nested objects? [closed] - javascript

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For example if we have:
let r = JSON.parse('{"o": {"name": "foo","lastName": "boo"}}');
Can we now do console.log(r.o.name); and get foo on the console?

Yes. Here's a runnable example:
let r = JSON.parse('{"o": {"name": "foo","lastName": "boo"}}');
console.log(r.o.name)

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How to iterate and append characters of an array by push [closed]

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var charArray=[a,b,c]
I want to have a new array as following:
var charArrayNew=[a, ab, abc]
Please suggest how to get the result of charArrayNew in ES6 Javascript.
You could do this:
const charArray=['a','b','c'];
const answer = charArray.map((_,i,ar)=>ar.slice(0,i+1).join(""));
console.log(answer);
// or, alternatively:
fn=(ar,res=[])=>(
ar.reduce((a,c)=>(res.push(a+=c),a),""),res );
console.log(fn(charArray))

Javascript Array to special Object [closed]

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I need for an Plugin an Object structure like this:
{
"Beer":145.53,
"Apple (red)":7.33,
"Apple (green)":0.03
}
Don't know how to write it that this shine.
I got the all values already so how to set it up like this?
Use this notation to make objects with those properties:
var obj = {};
obj["Beer"] = 145;
obj["Apple (red)"] = 7.5;
....

How can i get array key-values pair using javascript [closed]

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for(i=0;i<=array_values.length;i++){
var a=array_values[i].amounts;
var t=array_values[i].Tax;
alert(a);
alert(t);
}
Error : TypeError: array_values[i] is undefined
var a=array_values[i].amounts;
var a=array_values[i].amounts;
change
for(i=0;i<=array_values.length;i++)
to
for(i=0;i<array_values.length;i++)
<= to <

socket.io+ Node:Object #<Namespace> has no method 'clients' [closed]

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console.log(io.sockets.clients('test1234fgdgdfgdfg'));
It gives me error :
Object # has no method 'clients'
io.sockets.clients() can no longer be used after version Socket.IO version 1.0
Here's what you should use:
for (var clientId in io.sockets.adapter.rooms[roomId]) {
var clientSocket = io.sockets.connected[clientId];
}

Create an associative array in JavaScript [closed]

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Consider:
var playlist = {"bad romance":"gaga", "we cry":"the script"};
How can I get string "gaga" from my code? What is the name of my array in JavaScript programming?
Try Object instead of Array:
var playlist = {"bad romance":"gaga", "we cry":"the script"};
alert(playlist["bad romance"]); //gaga

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