How to define a variable with another variable value-CodePudding

I have a list of variables with dates as variable names like a290322, a300322, a310322 etc..

var a270322 = "https://google.com" ;
var a280322 = "https://youtube.com" ;
var a290322 = "https://facebook.com" ;
var a300322 = "https://twitter.com" ;
var a310322 = "https://instagram.com" ;
var a010422 = "https://sgquizdaily.com" ;
var a020422 = "https://maps.google.com" ;
var a030422 = "https://gmail.com" ;
var a040422 = "https://docs.google.com" ;

Now I want to declare a new variable named Today

The value of Today variable should match to the variable from the list of variables.

Manually day by day I can modify line like below.

var today = a300322 ;

But I don't know how to get it by script.

Can you help in assigning today dated variable value to Today?

CodePudding user response：

you can store the variable into an object so you can store and call the value based on the key like this

var a270322 = "https://google.com" ;
var a280322 = "https://youtube.com" ;
var a290322 = "https://facebook.com" ;
var a300322 = "https://twitter.com" ;
var a310322 = "https://instagram.com" ;
var a010422 = "https://sgquizdaily.com" ;
var a020422 = "https://maps.google.com" ;
var a030422 = "https://gmail.com" ;
var a040422 = "https://docs.google.com" ;

const variables = {
  a270322,
  a280322,
  a290322,
  a300322,
  a310322,
  a010422,
  a020422,
  a030422,
  a040422,
};

var today = 'a300322';

console.log(variables[today]); // https://twitter.com

CodePudding user response：

Get the current date through Date(), padding to 2 digits, slicing last two, prepend with 'a' and eval.

var a270322 = "https://google.com" ;
var a280322 = "https://youtube.com" ;
var a290322 = "https://facebook.com" ;
var a300322 = "https://twitter.com" ;
var a310322 = "https://instagram.com" ;
var a010422 = "https://sgquizdaily.com" ;
var a020422 = "https://maps.google.com" ;
var a030422 = "https://gmail.com" ;

const now = new Date()
var day = ('0'   now.getDate()).slice(-2)
var month = ('0'  (now.getMonth()   1).toString()).slice(-2)
var year = (now.getFullYear().toString()).slice(-2)
var Today = 'a'  day   month   year
console.log(Today)

TodaysUrl = eval(Today)
console.log(TodaysUrl)