Answer by Raman Sohi for Iterate through object properties
What for..in loop does is that it creates a new variable (var someVariable) and then stores each property of the given object in this new variable(someVariable) one by one. Therefore if you use block...
View ArticleAnswer by Danny R for Iterate through object properties
As of JavaScript 1.8.5 you can use Object.keys(obj) to get an Array of properties defined on the object itself (the ones that return true for obj.hasOwnProperty(key))....
View ArticleAnswer by Dominik for Iterate through object properties
Iterating over properties requires this additional hasOwnProperty check: for (var prop in obj) { if (Object.prototype.hasOwnProperty.call(obj, prop)) { // do stuff } } It's necessary because an...
View ArticleAnswer by user920041 for Iterate through object properties
Objects in JavaScript are collections of properties and can therefore be looped in a for each statement. You should think of obj as an key value collection.
View ArticleAnswer by arb for Iterate through object properties
Your for loop is iterating over all of the properties of the object obj. propt is defined in the first line of your for loop. It is a string that is a name of a property of the obj object. In the first...
View ArticleAnswer by Matt Ball for Iterate through object properties
It's just a for...in loop. Check out the documentation at Mozilla.
View ArticleAnswer by Marc B for Iterate through object properties
It's the for...in statement (MDN, ECMAScript spec). You can read it as "FOR every property IN the obj object, assign each property to the PROPT variable in turn".
View ArticleIterate through object properties
var obj = { name: "Simon", age: "20", clothing: { style: "simple", hipster: false } } for(var propt in obj){ console.log(propt + ': ' + obj[propt]); } How does the variable propt represent the...
View ArticleAnswer by Fouad Boukredine for Iterate through object properties
if(Object.keys(obj).length) { Object.keys(obj).forEach(key => { console.log("\n" + key + ": " + obj[key]); }); } // *** Explanation line by line *** // Explaining the bellow line // It checks if obj...
View ArticleAnswer by Kamil Kiełczewski for Iterate through object properties
Check typeYou can check how propt represent object propertis bytypeof proptto discover that it's just a string (name of property). It come up with every property in the object due the way of how for-in...
View ArticleAnswer by Ganesh for Iterate through object properties
Check this link it will help https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_state_forinvar person = {fname:"John", lname:"Doe", age:25}; var text = ""; var x; for (x in person) { text +=...
View ArticleAnswer by Sunny for Iterate through object properties
You can access the nested properties of object using for...in and forEach loop.for...in:for (const key in info) { consoled.log(info[key]);}forEach:Object.keys(info).forEach(function(prop) {...
View ArticleAnswer by danday74 for Iterate through object properties
If you just want to iterate to map property values then lodash has _.mapValuesconst obj = { a: 2, b: 3}const res = _.mapValues(obj, v => v * 2)console.log(res)<script...
View ArticleAnswer by NoWhere Man for Iterate through object properties
Simple and clear way to reach this, im modern JS without iterate the prototypes, is like this:Object.prototype.iterateProperties = ((callback) => { Object.keys(obj).filter(key =>...
View ArticleAnswer by Isaac Sichangi for Iterate through object properties
If you have an array of objects with their properties e.glet students = [{name:"John", gender:"male", yob:1991},{name:"Mary", gender:"female", yob:1994} ]You can iterate over the properties in 2...
View Article