Question

How to get the min date from an array of dates in TypeScript

Answer 1

function minDate(dates : any) : Date {
    let min = dates[0],
    obj = new Date(dates[0]);
 
    dates.forEach(function(dt : Date, index : number) {
      if (new Date( dt ) < obj) {
        min = dt;
        obj = new Date(dt);
      }
    });
 	return min;
}
 
const dates = ['2021/03/20', '2021/05/21', '2021/01/13', '2021/01/14', '2021/05/20']; 
           
console.log(minDate(dates));
  
  
  
/*
run:
  
"2021/01/13" 
 
*/

 

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Answer 2

const dates = ['2021/03/20', '2021/05/21', '2021/01/13', '2021/01/14', '2021/05/20']; 
           
const min = dates.reduce(function(a, b) { return a < b ? a : b; }); 
   
console.log(min);
  
  
  
/*
run:
  
"2021/01/13" 
 
*/

 

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