Question

How to print a map in TypeScript

Answer 1

const mp = new Map();
  
mp.set('a', 1);
mp.set('bb', 2);
mp.set('ccc', 3);
mp.set('dddd', 4);
mp.set('typescript', 5);
   
console.log([...mp.entries()]);
  
console.log([...mp.keys()]);
  
console.log([...mp.values()]);
   
   
   
   
/*
run:
   
[["a", 1], ["bb", 2], ["ccc", 3], ["dddd", 4], ["typescript", 5]] 
["a", "bb", "ccc", "dddd", "typescript"] 
[1, 2, 3, 4, 5] 
   
*/

 

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Answer 2

function printMap(value : any, key : any) {
    console.log(`Key: ${key}, Value: ${value}`);
}
  
const mp = new Map();
  
mp.set('a', 1);
mp.set('bb', 2);
mp.set('ccc', 3);
mp.set('dddd', 4);
mp.set('typescript', 5);
   
mp.forEach(printMap);   
   
   
   
   
/*
run:
   
"Key: a, Value: 1" 
"Key: bb, Value: 2" 
"Key: ccc, Value: 3" 
"Key: dddd, Value: 4" 
"Key: typescript, Value: 5" 
   
*/

 

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