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JavaScript: Retrieve all the values of an object's properties

JavaScript Object: Exercise-14 with Solution

Write a JavaScript function to retrieve all the values of an object's properties.

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to retrieve all the values of an object's properties.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function all_values(obj) {
    var keys = _keys(obj);
    var length = keys.length;
    var values = Array(length);
    for (var i = 0; i < length; i++) {
      values[i] = obj[keys[i]];
    }
    return values;
  }
function _keys(obj) 
 {
    if (!isObject(obj)) return [];
    if (Object.keys) return Object.keys(obj);
    var keys = [];
    for (var key in obj) if (_.has(obj, key)) keys.push(key);
    return keys;
  }
function isObject(obj)   
{  
    var type = typeof obj;  
    return type === 'function' || type === 'object' && !!obj;  
  } 
console.log(all_values({red: "#FF0000", green: "#00FF00", white: "#FFFFFF"}));

Sample Output:

["#FF0000","#00FF00","#FFFFFF"]

Flowchart:

Flowchart: JavaScript:- Retrieve all the values of an object's properties

Live Demo:

See the Pen javascript-object-exercise-14 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript function to retrieve all the names of object's own and inherited properties.
Next: Write a JavaScript function to convert an object into a list of '[key, value]' pairs.

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JavaScript: Tips of the Day

How to remove a specific item from an array?

Find the index of the array element you want to remove using indexOf, and then remove that index with splice.

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

const array = [2, 5, 9];

console.log(array);

const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);
}

// array = [2, 9]
console.log(array);

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

For the reason of completeness, here are functions. The first function removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:

function removeItemOnce(arr, value) {
  var index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  }
  return arr;
}

function removeItemAll(arr, value) {
  var i = 0;
  while (i < arr.length) {
    if (arr[i] === value) {
      arr.splice(i, 1);
    } else {
      ++i;
    }
  }
  return arr;
}
//Usage
console.log(removeItemOnce([2,5,9,1,5,8,5], 5))
console.log(removeItemAll([2,5,9,1,5,8,5], 5))

Ref: https://bit.ly/2N9nKRp