Question

How to iterate over map keys and values in TypeScript

Answer 1

const mp: Map<string, number> = new Map();
 
mp.set('c', 1);
mp.set('cpp', 2);
mp.set('java', 3);
mp.set('typescript', 4);
 
mp.forEach((value, key) => {
    console.log(`key: ${key} value: ${value}`);
});

  
  
/*
run:

"key: c value: 1" 
"key: cpp value: 2" 
"key: java value: 3" 
"key: typescript value: 4" 

*/

 

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Answer 2

const mp: Map<string, number> = new Map();
 
mp.set('c', 1);
mp.set('cpp', 2);
mp.set('java', 3);
mp.set('typescript', 4);
 
for (const [key, value] of mp) {
    console.log(key, value);
}

  
  
/*
run:

"c",  1 
"cpp",  2 
"java",  3 
"typescript",  4  

*/

 

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