javascript foreach array key code example

Example 1: javascript foreach get key and value

myObject ={a:1,b:2,c:3}

//es6
Object.entries(myObject).forEach(([key, value]) => {
  console.log(key , value); // key ,value
});

//es7
Object.keys(myObject).forEach(key => {
    console.log(key , myObject[key]) // key , value
})

Example 2: js loop through associative array

var months = [];
months["jan"] = "January";
months["feb"] = "February";
months["mar"] = "march";

for (var key in months) {
    var value = months[key];
    console.log(key, value);
}