use variable value as array name in jquery

Question

I have numbers of a dynamically generated array in my script such as below:

var abc = {
    'Lorem' = 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'Why' = 'but also the leap into electronic typesetting',
    'Where' = 'making it over 2000 years old.'
}

var def = {
     'Lore' = 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'hy' = 'but also the leap into electronic typesetting',
    'Whre' = 'making it over 2000 years old.'
}

var ghi = { 
    'Lrem' = 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'Wh' = 'but also the leap into electronic typesetting',
    'Were' = 'making it over 2000 years old.'
}

Now I need to get value from an array, I got the name of the array dynamically from a user and I store it in a variable like array_name.

I was trying to get value from variable like

var array_name = `abc`;
console.log(array_name['lorem']);

it gives me undefined as a response. Also, try to store value in hidden field and get value from textbox, but it hadn't work for me:

console.log(($('#array_name').val()['lorem']);

Please help me get value from array.

Roberto Bisello · Accepted Answer · 2017-10-25 07:07:55Z

honestly I don't really like to use eval, if your random variable are globally scoped you can access it with window[array_name]['Lorem'], otherwise if they are limited inside a function or similiar, I suggest you to use a different approach, something like

var randomVars = {};
randomVars.abc = {
    'Lorem': 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'Why' : 'but also the leap into electronic typesetting',
    'Where' : 'making it over 2000 years old.'
}

randomVars.def = {
     'Lore': 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'hy' :'but also the leap into electronic typesetting',
    'Whre' : 'making it over 2000 years old.'
}

randomVars.ghi = { 
    'Lrem' : 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'Wh' : 'but also the leap into electronic typesetting',
    'Were' : 'making it over 2000 years old.'
}

in this way you can call your text like randomVars[array_name]['Lorem']

Harsh Patel · Accepted Answer · 2017-10-25 06:54:55Z

1

Dont assign array_name to a string.

var abc = {
    'Lorem': 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'Why' : 'but also the leap into electronic typesetting',
    'Where' : 'making it over 2000 years old.'
}

var def = {
     'Lore': 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'hy' :'but also the leap into electronic typesetting',
    'Whre' : 'making it over 2000 years old.'
}

var ghi = { 
    'Lrem' : 'Ipsum is simply dummy text of the printing and typesetting industry.',
    'Wh' : 'but also the leap into electronic typesetting',
    'Were' : 'making it over 2000 years old.'
}

let new_name = abc
console.log(new_name['Lorem'])

answered Oct 25, 2017 at 6:54

Harsh Patel

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2 Comments

Carsten Løvbo Andersen Over a year ago

The OP wants it to be a string, you are just referring to the obj. Since you say Dont assign array_name to a string. then why not just console.log(abc['Lorem'])

Harsh Patel Over a year ago

You can convert a string to object as well. @CarstenLøvboAndersen

Satpal · Accepted Answer · 2017-10-25 07:04:30Z

0

I would suggest you to create a object to hold object abc,def,..., then Bracket notation can be used to access the desired property using a string

let obj = {
  abc: {
    'Lorem': 'Ipsum is simply dummy text of the printing and typesetting industry.'
  },
  def: {
    'Lore': 'Ipsum is simply dummy text of the printing and typesetting industry.'
  },
  ghi: {
    'Lrem': 'Ipsum is simply dummy text of the printing and typesetting industry.'
  }
}

console.log(obj['abc'])

answered Oct 25, 2017 at 7:04

Satpal

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