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Object.entries()

temmietope profile image Temitope Ayodele ・1 min read

Object.entries() is used for listing all key-value pairs in an object. It accepts an object as a argument, and returns an array enumerating the key-value pairs of an object.

const obj = { 
  1: 'Israel', 
  2: 'Temi', 
  3: 'Miro' 
};
console.log(Object.entries(obj))

//Expected result: [ ["1", "Israel"], ["2", "Temi"], ["3", "Ayo"]]

Another example:

const obj1 = {
  a: 'Hello',
  b: 28
};

for (let [key, value] of Object.entries(obj1)) {
  console.log(`${key}: ${value}`);
}

//Expected result: 
// "a: Hello"
// "b: 28"

If the argument passed is not an object, it causes TypeError,
If the key passed in the argument is not in the range of the property[key, value] pair, it causes RangeError.

Discussion

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Nice post for beginners ❤

Just a tip, if you want to have syntax highlighting in your post you can just add the language name directly after the first three backquotes of the code block!

It would look like this:

console.log('hi')