let a = 5, b = 6; [a, b] = [b, a]; // Destructuring Assignment Array Matching
Here is what the above code is Doing:
1. The first line creates an array with two elements, 5 and 6.
2. The second line assigns the first element of the array to a and the second element to b.
3. The third line swaps the values of a and b by destructuring the array.
// unhandledPromiseRejectionWarning: MongoInvalidArgumentError: //Operation “limit” requires an integer const size = parseInt(req.query.size); Here is what the above code is Doing: 1. We’re using the parseInt() function to convert the size query parameter to an integer. 2. We’re using the parseInt() function to convert the page query parameter to an integer. 3. We’re using the skip()…
google.maps.event.addListenerOnce(map, ‘idle’, function(){ // do something only the first time the map is loaded }); Here is what the above code is Doing: 1. Create a new map object 2. Set the map’s center to the coordinates of the city of San Francisco 3. Set the map’s zoom level to 12 4. Add a marker…
$(“#someElement”).fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100); Here is what the above code is Doing: 1. Fade out the element with id=”someElement” 2. Fade in the element with id=”someElement” 3. Fade out the element with id=”someElement” 4. Fade in the element with id=”someElement”
var Str = “Hello There!” var SplitOn = ” ” var Results = Str.split(SplitOn); //Results[0] will be ‘Hello’ and Results[1] will be ‘There!’ Here is what the above code is Doing: 1. We create a variable called Str and set it equal to the string “Hello There!” 2. We create a variable called SplitOn and…
$(“#loading”).ajaxStart(function(){ $(this).show(); }); $(“#loading”).ajaxComplete(function(){ $(this).hide(); }); Here is what the above code is Doing: 1. When the page loads, the div with the id of “loading” is hidden. 2. When an ajax request starts, the div with the id of “loading” is shown. 3. When an ajax request completes, the div with the id of…
let a = { a: 1, b: true } let b = { y: 093, z: ‘This is an object’ } const c = {…a, …b} Here is what the above code is Doing: 1. We’re creating an object called a. 2. We’re creating an object called b. 3. We’re creating a new object called…