Question

How to extract the first number from string in Node.js

Answer 1

const s = "nodejs412hjdsf72q1p0on8mq php 9953";
  
const arr = s.match(/^\d+|\d+\b|\d+(?=\w)/g).map(function (n) {return + n;});
  
console.log(arr[0]); 
  
  
    
      
      
/*
run:
      
412
      
*/

 

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Answer 2

const s = "nodejs412hjdsf72q1p0on8mq php 9953";
  
const arr = s.match(/^\d+|\d+\b|\d+(?=\w)/g);
  
console.log(arr[0]); 
  
  
    
      
      
/*
run:
      
412
      
*/

 

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Answer 3

const s = "nodejs412hjdsf72q1p0on8mq php 9953";
  
const n = s.match(/\d+/)[0];
   
console.log(n); 
  
  
    
      
      
/*
run:
      
412
      
*/

 

70+ SQL courses for beginners and professionals