map javascript enumerate code example
Example 1: loop through map in js
var myMap = new Map();
myMap.set("0", "foo");
myMap.set(1, "bar");
myMap.set({}, "baz");
for (const [key, value] of myMap.entries()) {
console.log(key, value);
}
Example 2: javascript map foreach
const myArray = ['Sam', 'Alice', 'Nick', 'Matt'];
const newArray = myArray.map(name => {
return 'My name is ' + name;
});
console.log(newArray);
const anotherArray = myArray.map((value, index) => index + ": " + value);
console.log(anotherArray);
console.log(myArray);