What are some ways to duplicate values in a JavaScript array?

Question

What are some ways to duplicate values in a JavaScript array?

In this code snippet, I have two arrays and I want to combine them into another array called data:

data=[];
atIndex=0;
//userInfo contains the user's name and last name:
userInfo=['Mohammad','Kermani'];
//userKnow contains the information that the user knows:
userKnow=['php','javascript'];

data[atIndex]=userInfo;

data[atIndex]=userInfo;
data[atIndex]=userKnow;

//I intend to send the data using JSON and decode it with PHP:
console.log(data);

However, only the last data is stored in the data array.

It appears that it might be a nested array or two-dimensional array.

DEMO

javascript arrays json

Answer 1

Answer №1

One option is to organize the data as an array of objects...

data[atIndex] = { userInfo: userInfo, userKnow, userKnow };

This way, you can access the information like this:

var userInfo = data[0].userInfo;
var userKnow = data[0].userKnow;

Your JSON structure would look similar to this (formatted for readability):

[ 
    { userInfo: ['Mohammad', 'Kermani'], userKnow: ['php', 'javascript'] }
]

If you want to include user information and their knowledge in one object, consider the following structure:

var userObject = {
    name1: 'Mohammad',
    name2: 'Kermani',
    userKnow: ['php', 'javascript']
};

You can use this object like this:

userObject.name1 = 'my name';// set name1
var name2 = userObject.name2;// get name2

Answer 2

One option is to organize the data as an array of objects...

data[atIndex] = { userInfo: userInfo, userKnow, userKnow };

This way, you can access the information like this:

var userInfo = data[0].userInfo;
var userKnow = data[0].userKnow;

Your JSON structure would look similar to this (formatted for readability):

[ 
    { userInfo: ['Mohammad', 'Kermani'], userKnow: ['php', 'javascript'] }
]

If you want to include user information and their knowledge in one object, consider the following structure:

var userObject = {
    name1: 'Mohammad',
    name2: 'Kermani',
    userKnow: ['php', 'javascript']
};

You can use this object like this:

userObject.name1 = 'my name';// set name1
var name2 = userObject.name2;// get name2

What are some ways to duplicate values in a JavaScript array?

Answer №1

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